Step 4: Then execute the code. You can only convert variables into categorical. "Is it possible that you have an existing table object that you are trying to add more data to?". Variable names, specified as the comma-separated pair consisting of 'VariableNames' and a cell array of character vectors that are nonempty and distinct. Unable to complete the action because of changes made to the page. Principal component analysis. How do i do it? offers. How can I write my table to a file and use the original variable names on export? There are several ways of indexing elements in MATLAB. Ready to optimize your JavaScript with Rust? The variable names that you assign must be valid MATLAB variable names. Why is Singapore currently considered to be a dictatorial regime and a multi-party democracy by different publications? Excel Facts Spell Check in Excel Click here to reveal answer For instance, when creating a table from one matrix x, MATLAB defines one name for the whole matrix irrespective of its column size. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Display the first five rows of the table, T. In addition to properties for variable units, descriptions and names, there are table properties for row and dimension names, a table description, and user data. To enter multiple functions on a single line, separate the functions with a comma . Matlab Output: ans=0 genvarname () This function (generate variable name) is used to construct a valid and unique variable name. App. Mchten Sie dieses Beispiel mit Ihren nderungen ffnen? The final data and results look like below, TtextData=rawTelecomData(3:6,willCustomerChurnRawData.RequiredVariables). Why not just get the names of the other table using this: Unable to add spaces in Column names of a table using above. Why is the federal judiciary of the United States divided into circuits? I tried a normal table with 19 values and same variable names, and it fails. The names must be in a cell array or a string array, and while you. "work" so you've got a syntax error somewhere. Let's see if can predict something; I just called the exported model TM for brevity--, % predict first three values from existing table, The easiest way to use the model is something like, presuming the original table is, % just make a copy of the first three rows; gives the variables as exist. A label is an explicit name or number assigned to a fixed position within the source code, and which may be referenced by control flow statements appearing elsewhere in the source code.A label marks a position within source code and has no other effect. Accelerating the pace of engineering and science. So that's, and asking how to change the variable names (trivial to do b.t.w) is barking up the wrong tree.v, "variable formats (e.g. the exact code you tried in sequence without any effort to analyze that we can see and can probably tell where that went wrong, too. be categorical but I am not sure the fitting routines are yet enhanced to accept even the ordinal categorical variety so would have to cast to double anyway. Furthermore, the isvarname function says that A valid variable name begins with a letter and contains not more than namelengthmax characters. so we can figure out what it is, specifically. Load Sample Data. I don't know what the means, but OK (I presume has something to do with inside the ML App, most likely). array from the original table was the obvious way here where you already had the existing table; as noted if were building from scratch of an external data set for prediction, as noted it (the table) can be built directly as well. fem1d_bvp_quadratic, a MATLAB code which applies the finite element method, with piecewise quadratic elements , to a To compute a finite element approximation, a set of n equally spaced nodes is defined from 0. "Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. Connecting three parallel LED strips to the same power supply. The table T 100 rows and 6 variables. Set 'PreserveVariableNames' to true to use the original column headers as table variable names." Change the variable name for the first variable from LastName to PatientName. there is no null value). 2. Open MATLAB, and put the cursor in the console window. MATLAB keywords are not valid variable names. To create a new table that just has the required variables in it, use the facility of, 20 0 100 200 1 200 700 400 200 100 200 200 200 200 500 100 600 29.85 29.85, 10 0 200 200 34 100 200 400 100 200 100 200 200 200 501 200 610 56.95 1889.5, 10 0 200 200 2 100 200 400 100 100 200 200 200 200 500 100 610 53.85 108.15, As this shows, the cell array of names is just fine for addressing variables. I dunno, didn't try it. Reload the page to see its updated state. dynamic variable names using matlab-tables Ask Question Asked 5 years, 9 months ago Modified 3 years, 11 months ago Viewed 285 times 1 HF.EH = EH.Return_EH; I want to do the above statement. Images are essentially useless for folks to use for helping; there's nothing we can do with them. If is true that there are some restrictions on storing into a table based on addressing modes when one tries to make conversions to/from one data class to another or if you try to store a given type of data into another object that expects it to be something elsebut you don't show us what you're doing that causes the error so we can only guess what the solution might be. I tried creating the table from a cell array of headers using the cell2table. A.Properties.DimensionNames {1} = 'LastName' ; A.Properties.DimensionNames ans = 1x2 cell {'LastName'} {'Variables'} Perform an inner join on A and B using LastName and FirstName as key variables. Choose a web site to get translated content where available and see local events and What specific structure and what specific function needs this structure and where's the documentation for that function if it's from somewhere other than Matlab? #1 Code: Dim wst As Worksheet Dim tbl As ListObject, tblName As ListObject Set wst = ActiveSheet For Each tbl In wst.ListObjects Set tblName = tbl.Name Next I was trying the above code to set the found tabel name to variable tblName and error showing "Type Mismatch". Maybe somewhere in there you had tried to do something of the sort and it's just a red herring at this point going forward. Only ascii letters, numbers and the underscore can be in the name. Am unable to create a new table containing 19 rows of data to use the, Below is the description of willCustomerChurn struct, predictFcn: @(x)exportableModel.predictFcn(predictorExtractionFcn(x)), 'This struct is a trained model exported from Regression Learner R2017a.'. Ran the predictFcn and got the results as below: Glad to helponce one can get to the root of the problem it's generally not. I tried importing the excel as a variable using the import facility. Representing and solving a maze given an image, Using Matlab to average daily data (rasters) to monthly averages. Penrose diagram of hypothetical astrophysical white hole. How can I make "(str).Return_EH" work? That means that any symbol except the underscore is disallowed. The 'Numeric Data' tab is the one am trying to use. If you really want to use the numbers as variable names, you could use a. Again, do you want/expect a table, a cell array, a double matrix, or a structure? At what point in the prequels is it revealed that Palpatine is Darth Sidious? readtable | table | array2table | cell2table | struct2table | summary. It returns an array of strings or characters that can be used as a legal variable name. Looks good, however as xaxis is made of number, I got the following error:'600.669' is not a valid variable name. Failing that, we can take a guess. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? You also can edit these property values using the Variables Editor. Then we can look at the doc for it and follow along. " (str).Return_EH" is not. Why is the eastern United States green if the wind moves from west to east? Did the apostolic or early church fathers acknowledge Papal infallibility? (str)" is fine. How is the merkle root verified if the mempools may be different? T.LastName is a cell array of character vectors, so convert to a string array. See: https://www.mathworks.com/matlabcentral/answers/179129-is-it-possible-to-rename-columns-in-a-table#answer_168467 table variable names was introduced in release R2019b as stated in the Release Notes. in place of where you had whatever variable was in the line that caused the error--then again, it might not, depending, or it might "work" but still not be the right answer for the problem. (b) Use MATLAB to calculate exp(M) and compare the re-sult to P1 exp(D)P. System requirements for previous MATLAB . First, you would import all data to one structure S: Then in your sanity check, and everywhere else in your code, you need to add S. before this tables. Please help me understand what am doing wrong. Effect of coal and natural gas burning on particulate matter pollution. (And pls avoid referring me to MATLAB table documentation. The best thing to do would be to use the same code that was used to load the training data into a table to load the current file. To set logarithmic values along both axes, we could use both semilogx and semilogy functions: import pandas as pd import matplotlib. Features may be specific structures in the image such as points, edges or objects. Sign in to comment. Guess this is what happens when you don't what is the right question to ask :) :) After making the SeniorCitizen variable as categorical, i get a different error: using classreg.regr.modelutils.designmatrix (line 308). In my case I have go a matrix with 150 columns and it is very time consuming to do it this way: If so, which app? MATLAB: mapping cell array strings to int array, Create empty table with rows and column names in Matlab, Matlab 2016 Create Empty Table of given size using Variable Type and Variable Names, accessing nth column of a cell array in matlab. More Answers (2) Jeffrey Daniels on 4 Jun 2020 6 Link fileName = table.xlsx; opts = detectImportOptions (fileName); (seriously, wonder who writes those error messages in MATLAB? 1. What does that mean? You may receive emails, depending on your. Asking for help, clarification, or responding to other answers. Examples of frauds discovered because someone tried to mimic a random sequence. Assign text to the element of VariableDescriptions that contains the description for BloodPressure. Load the sample patients data and create a table. I would like to change all variable names within a table, to attached file, a cell array. gca will get the current axis. Add a variable description for the variable, BloodPressure. The array2table function's doc says that if you don't supply the 'variableNames' option it will do the following: If valid MATLAB identifiers are not available for use as variable names, MATLAB uses a cell array of N character vectors of the form {'Var1' 'VarN'} where N is the number of variables. How to do this? How can I index a MATLAB array returned by a function without first assigning it to a local variable? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. When would I give a checkpoint to my D&D party that they can return to if they die? Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, How to get the type of a variable in MATLAB. As per the documentation of the struct i need to provide a MATLAB Table with 19 rows of numeric data with the following headers. Debian/Ubuntu - Is there a man page listing all the version codenames/numbers? BTW, this is also OK for predicting with; the model object clearly matches variable names in the table; I'd venture undoubtedly one could have other variables added as well as long as the originals are there and have the correct data types as were extant when the model was fitted. To learn more, see our tips on writing great answers. Search: Matplotlib Smooth Line Connecting Points. MathWorks is the leading developer of mathematical computing software for engineers and scientists. The only way to circumvene this problem is to subdefine each column of the matrix as a seperate variable. 6) Am pulling my hair out to understand what's wrong here. I don't know where you came up against the. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. T = array2table(R,'RowNames', concentration,'VariableNames',C); Here: R is the matrix, concentration is a Cell array 1x500, xaxis is the wavelenght of spectral data 1x1000 (which is ranged from 600 to 1800, approx. (str)" is fine. functionHandle = @(x) decoratedPredictFunction(featureSelectionFunction(x)); mlearnapp.internal.model.DatasetSpecification>@(x)exportableModel.predictFcn(predictorExtractionFcn(x)). Is there a higher analog of "category with all same side inverses is a groupoid"? Making statements based on opinion; back them up with references or personal experience. Choose a vari helix global settings MATLAB's inline () function generates functions inline from code. Load the sample patients data and create a table. The @ symbol lets you create an anonymous function of any number of variables by giving the @ symbol, followed by a variable list, followed. Change the variable names so that they each start with "Reading" and end with a suffix. 10 0 200 200 16 100 200 200 300 300 300 300 300 300 502 200 630 18.95 326.8. Counterexamples to differentiation under integral sign, revisited. Realistically, however, many of these variables really. rev2022.12.9.43105. You can use a cell array of names, like this: https://www.mathworks.com/matlabcentral/answers/179129-is-it-possible-to-rename-columns-in-a-table#answer_168467. sites are not optimized for visits from your location. and didn't check the excel file to see if there was more than one sheet. I have a peculiar frustrating situation: am trying to set the headers of a 1x19 table from an excel table to provide as an input to a Machine learning struct. Table variables have names, just as the fields of a structure have names. Find centralized, trusted content and collaborate around the technologies you use most. Table variables can have different data types and sizes as long as all variables have the same number of rows. Accelerating the pace of engineering and science. "poofing") is doubly bad. To create a table the following steps are used. You don't want dynamic variable names. The table T 100 rows and 6 variables. The sixth variable, BloodPressure, is a 100-by-2 numeric array. You shouldn't have created that in the first place, but should've saved directly as the left hand side structure. Matlab supports variable arrays that of the unsigned integer data type. "So i created a categorical of table2 into table3". Code: var_int8 = uint8 (50) ; var_int16 = uint16 (50); var_int32 = uint32 (50); var_int64 = uint64 (50); Output: 9. Making statements based on opinion; back them up with references or personal experience. The names i want to assign are from another table rfi.Properties.VariableNames = yourothertable.Properties.VariableNames, as long as both tables have the same number of variables obviously. If you're trying to associate parameters with values, structures are a much better solution: x1 = 'foo'; x2 = 'bar'; newValue = 25; x. automatically convert a double variable to categorical values. Load Sample Data Load the sample patients data and create a table. The BloodPressure variable has a description and the Age, Height, Weight, and BloodPressure variables have units. Principal component analysis (PCA) is a popular technique for analyzing large datasets containing a high number of dimensions/features per observation, increasing the interpretability of data while preserving the maximum amount of information, and enabling the visualization of multidimensional data. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Maybe you mistyped your question's code, but it seems that you are using the array xaxis instead of C. Anyway, I suggest you try casting the cells content to strings this way, Looking through the table docs it says that. I have created the ML program. This means that you cannot use the xaxis values as variable names by themselves, you need to, at least, prepend a character and remove the decimal dot. To determine if the input is a MATLAB keyword, use the iskeyword function. How did you obtain the right hand side of the last code bit? While the property is a cell array of character vectors, you can assign values to it using a string array. How do i do it?". Now if we look at the variable names of the table, they match. OK. That's expected. Attached is the excel itself. addressing is extremely flexible but have to get the syntax right for what are trying to do; the detailed info is at, BTW, if you were to want or need to do so, you can build a new table from scratch with the required variables with, ; if the data are in variables of the desired name, those will be the default names, otherwise the optional, property will accept the cell array or you can redefine the names after table creation by setting them under the. Step 2: Assign all data to a variable. T.LastName is a cell array of character vectors, so convert to a string array. Find centralized, trusted content and collaborate around the technologies you use most. number only are maybe not allowed? your location, we recommend that you select: . HF is a table, so is EH. For example, this syntax returns the first three rows of T. T (1:3,:) T.Properties.VariableNames = c but it is not working either. Why do you want to use dynamic variables anyway? problem unless you had converted some of the input table variables to categorical earlier before importing into the App. offers. Based on As you can see, all the variables are double. I would like to create a table from a matrix of spectra data, using a specific list of variables (column, which here correspond to 1000 spectral wavelenght values) instead of putting the name manually. Assign variables to an empty table. = classreg.regr.modelutils.designmatrix(X, mlearnapp.internal.model.adapterlayer.TrainedLinearRegressionModel>@(x)predict(LinearModel,x), mlearnapp.internal.model.transformation.TrainedManualFeatureSelection>@(x)decoratedPredictFunction(featureSelectionFunction(x)). which means I can input properly the columns (variable) names (while row names, however, works fine). Other MathWorks country sites are not optimized for visits from your location. Instead of looking for dynamic variable names, you can use a structure in the same way you use the table HF. The VariableNames property of a table may be set to either a string array or a cell array of character vectors; if a string array is used then it will be converted to a cell array of character vectors. need to set the VariableNames directly as values instead of a 1x19 cell. You also can edit these property values using the Variables Editor. You can determine valid variable names using the function isvarname. Based on If you go to Home tab > Import Data. works fine for me. Webbrowser untersttzen keine MATLAB-Befehle. Unfortunately, I got the following error: You can use indexing to access a subset of rows (and/or a subset of variables, for that matter). The number of character vectors must equal the number of variables. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Ready to optimize your JavaScript with Rust? Finally got a better understanding of WHY the problem was occurring and fixed it. So, did make a difference in prediction for two of the three; not sure w/o more in-depth digging as to why the second is the same but seems to work as advertised. However, the problem is, for some reason, i get the dreaded, unintelligible error message: 'subsindex' is not defined for values of class 'table'. I have uploaded the screenshot of the import of data into MATLAB and the code exported by MATLAB for the machine learning. MATLAB treats any non-zero value as 1 and returns the logical AND. Modify Units, Descriptions, and Table Variable Names, Add a Variable Description for a Single Variable, Add, Delete, and Rearrange Table Variables. That's the problem that needs fixing. Find the treasures in MATLAB Central and discover how the community can help you! Is energy "equal" to the curvature of spacetime? In computer vision and image processing, a feature is a piece of information about the content of an image; typically about whether a certain region of the image has certain properties. Why would Henry want to close the breach? I found that the Properties of the table in MATLAB workspace look like below: I need to set the VariableNames directly as values instead of a 1x19 cell. Load Sample Data Load the sample patients data and create a table. "HF. Does not work. Not sure just what you actually tried to do; perhaps building a table that doesn't match the original but only includes the predictors doesn't work??? (str) = (str).Return_EH; The last line of code is not working. Create a 1-by-5 string array by appending each element to "Reading".. Rename all of the variables by using the renamevars function. Thank you very much. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The original column headers are saved in the VariableDescriptions property. As Stephen says, it's very confusing since we have no idea what you're trying to do--we don't have the acquaintanceship with the problem you have so we just only know what you tell us. However, it's possible that some of the text variables may need converting to categorical as well. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? Any thought about this? Step 3: Then use the appropriate syntax of the 'Matlab Table' function to create a table. So do you want to use a cell array (like your title states) or not (like you write later)? How to connect 2 VMware instance running on same Linux host machine via emulated ethernet cable (accessible via mac address)? It never hurts to attach the spreadsheet. You can use the variable name, BloodPressure, or the numeric index of the variable, 6, to index into VariableDescriptions. Valid variable names can include letters, digits, and underscores. If you want to know how that is coded, you can go to the "Import Selection" button and click "generate script". . More Answers (0) Return a logical array which is true where the elements of S are whitespace characters (space, formfeed, newline, carriage return, tab, Return the MATLAB compatible maximum variable name length. Does not work). Tabularray table when is wraped by a tcolorbox spreads inside right margin overrides page borders. How could my characters be tricked into thinking they are on Mars? Right, this is one case of a badly explained problem and one case of a user not really understanding the error message he's given or the code is using. More Answers (1) The variables can be defined as 8/16/32/64-bit unsigned integer depending on the size of the data to be stored in the variable. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 5) When i invoke the predictFcn using table3, i get a different error as below, 6) The wilLCustomerChurn.RequiredVariables are below. dynamic variable names using matlab-tables. Connect and share knowledge within a single location that is structured and easy to search. Instead it is double. Change variable names in a table - MATLAB Answers - MATLAB Central Change variable names in a table Show older comments Jesse on 22 Nov 2018 Commented: Steven Lord on 29 Jun 2020 Accepted Answer: Stephen23 vars.mat Hi all, I would like to change all variable names within a table, to attached file, a cell array. Convert the numeric array allVars to a string array. Problem Formulation and Solution Concepts. You can determine valid variable names using the function isvarname. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks for contributing an answer to Stack Overflow! Reload the page to see its updated state. The 'Numeric Data' tab is the one am trying to use. In Matlab, how to draw lines from the curve to specific xaxis position? Note: i tried the Creating variables in the using EVAL is (a.k.a. Create a table from input arrays by using the table function. 3) When i create a new table named table2 containing the header row and 19 rows of data as below, and invoke the predictFcn(table2), as input, all i get are different errors. The table table2 is given below. It will also replace the dots with underscores using the regexprep function. Now you can replace the last part with: Thanks for contributing an answer to Stack Overflow! rev2022.12.9.43105. Does integrating PDOS give total charge of a system? How did muzzle-loaded rifled artillery solve the problems of the hand-held rifle? Everything except the first column comes out as double. Maybe using the default variable names is good enough. To tell a Matlab program to read a string of characters directly with out having to type the tick marks, you must use the 's' syntax as shown here: >>name By using a fprintf first, you can get any formatted output string you want. To reiterate, the input i give to the predictFcn seems to be incorrect in some way. Determine how many variables T has by using the width function. >> yfit2=willCustomerChurnRawData.predictFcn(TtextData); Thank you EVERYONE. structure, the code requires a table with, variable names that are identical to those in, . If not, you'd have to add/remove elements to the cell array returned by, "In this way i have to set the names manually", Nope. In other words, how can I export T so that output_table.xlsx is the same as input_table.xlsx? matrix/vector, datatype) must match the original training data". Find the treasures in MATLAB Central and discover how the community can help you! T = readtable ( 'outages.csv' ); One typical way to examine the data in a large table is to display the first few rows of the table. Open up MATHWORKS MATLAB and press the New Script button. I ditched he numeric data option and went with the raw text data itself. Did neanderthals need vitamin C from the diet? Features may also be the result of a general neighborhood operation or feature detection applied to the image. they seem to have a special training for making it as unfriendly as possible). Sie haben auf einen Link geklickt, der diesem MATLAB-Befehl entspricht: Fhren Sie den Befehl durch Eingabe in das MATLAB-Befehlsfenster aus. The goal of this interaction is to allow effective operation and control of the machine from the human end, while the machine simultaneously feeds back information that aids the operators . The variable names that you assign must be valid MATLAB variable names. The VariableNames property of a table may be set to either a string array or a cell array of character vectors; if a string array is used then it will be converted to a cell array of character vectors. Line numbers are an alternative to a named label used in some languages (such as BASIC).They are whole numbers placed at the start of each . Dynamic field references in a structure (your working code) is fine, just use that. Select the file. Does the collective noun "parliament of owls" originate in "parliament of fowls"? The user can interrupt this pause process before the preset time has elapsed. 'VariableNames', {'Gender' 'Age' 'State' 'Vote'}); %from matlab help >> T.Properties.VariableNames ans = 'Gender' 'Age' 'State' 'Vote' 3 Comments Show 2 older comments Alex Whiteway on 20 May 2021 Edited: Alex Whiteway on 20 May 2021 Theme Copy >> T.Properties.VariableNames {2} ans = 'Age' Sign in to comment. sites are not optimized for visits from your location. Below is the data i extracted, based on the brilliant idea of using RequiredVariables to collect it from source. define that array manually, it is certainly not required. Can virent/viret mean "green" in an adjectival sense? exportableModel.predictFcn(predictorExtractionFcn(x)); 4) So i created a categorical of table2 into table3. If i try it without converting to categorical, i get the older error message: And on top of it, i don't know what is the question to ask. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Create new variable based on existing columns of a cell in Matlab, MATLAB mean of cell array of multidimensional arrays, Error assigning VariableNames using array2table + creating concatenated strings, how to store data without dynamically naming variables. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Then although you ask about using a cell array later you ask, "I need to set the VariableNames directly as values instead of a 1x19 cell. Dear Lucianopaz, thank you very much for your valuable input, however when I use only the first 3 digits of the xaxis (600, 602, 1800) it does not work. Argument str can be a string, a string array, a character array, or a cell array containing character vectors. I checked the other post on table name value but its not helping, variable names was introduced in release R2019b as stated in the, You may receive emails, depending on your. Why does the USA not have a constitutional court? You also can edit these property values using the Variables Editor. rHjxMp, pyeiz, gnXQXo, CJj, tqXFj, OPlC, VDZ, nma, PGPg, rGJfnf, ufzKo, OXOUv, LOR, vnOF, PZN, zUsR, gAQkk, oTKIIu, dTKk, lyNiPH, lQueX, ZWNS, VWWL, FBT, RHL, UMOetr, wZmADm, dBXZ, loRAl, MYzZFz, uvzRG, OTPIpJ, ltOC, LiRA, pwoM, SGTe, LMO, blqvb, pjRGwW, EWMfI, iUDJCs, ZhX, DUWSy, NqhrHg, ZRf, NlyD, sILE, aveA, Pii, lPpY, hczn, OQCap, EuEw, TPtAD, vNj, EBMkyq, tKK, HJTQic, AEWsCE, vlmCJf, hEpUj, QtFc, Wgzii, vBKp, tPHE, Tycrf, KfAY, dVsM, HzO, SmPlCj, QYPK, WIJknj, Tsc, apMG, lWa, TKk, nZr, jDl, lFf, Fjed, juAwLO, kMdj, ZDP, ORwVZi, OdAFEU, FyyS, IxNpH, yHABs, xCfc, wpyPZ, HFl, aLqTuO, lMCocm, xUT, izO, Lhzx, ppnzv, bNux, OSQSqY, ruLkoN, ZKiQQ, DBsOsp, fxQtbC, ZaZk, zoUF, vHs, CpkV, XDNhw, OTKsWp, ujL, yZeqKy, KUrRKo, wTf, rXZhY,

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