Find the treasures in MATLAB Central and discover how the community can help you! Are there any MTG cards which test for first strike? You can do any number of copies between variables, structure fields, or cell array elements and only a pointer to the original data is used to store the "copy". i.e instead of writing variable names in the command save(filename,"var1","var2","var3") I want to be able to write the mat file names.mat somewhere in the command so that these variables are automatically saved in the file results.mat. test1.mat, that should contain a1, then test2.mat should contain a2 and so on. Find the treasures in MATLAB Central and discover how the community can help you! 1 Answer Sorted by: 0 You can exploit the dynamic field naming of the struct data type. The MAT-file object does not support indexing into: The MAT-file object does not support evaluating function handles using the m output. Other MathWorks country sites are not optimized for visits from your location. Display all variables stored in the MAT-file, myFile.mat. MathWorks is the leading developer of mathematical computing software for engineers and scientists. where "name" is manually entered each time. The following code creates a 2-by-4, You may receive emails, depending on your. You can exploit the dynamic field naming of the struct data type. Choose a web site to get translated content where available and see local events and offers. Now I want to save this array in a .mat file but I want to change the variable name. +1, SHAWN this answer , answered your question already. matlab - save variables to a mat file by reading variable names from You may receive emails, depending on your. declval<_Xp(&)()>()() - what does this mean in the below context? rev2023.6.27.43513. Choose a web site to get translated content where available and see local events and offers. Other MathWorks country sites are not optimized for visits from your location. 0 . Find the treasures in MATLAB Central and discover how the community can help you! Choose a web site to get translated content where available and see local events and offers. If filename exists, save overwrites the file. what should xxx be to do that ? of These variables are already present in the base workspace. MATLAB Answers; File Exchange; Cody; . Now I want to save this array in a .mat file but I want to change the variable name. Another complexity is that the length of the "b_value"-vector (in this case 4 values, but it could also be 2 or 10 values) changes based on the input of the program. Access MAT-file object properties using the syntax ObjectName.Properties.PropertyName, where PropertyName is the name of a property. example Name of the MAT-file, specified as a character vector or string scalar. Using variable names for saving data - MATLAB Answers - MathWorks Does not support writing (assigning values) to a subset of a sparse array by indexing. details = whos(matObj,VarName1,,VarNameN) returns information about the specified variables. 1 Link Translate Commented: Eleanna Kritikaki on 28 Jan 2020 Accepted Answer: Jan I have a function where I do my calculation to get A cell or array. You can also select a web site from the following list. c=who contains all of these variable names. Other MathWorks country sites are not optimized for visits from your location. true Enable write access to the MAT-file from the MAT-file object. https://www.mathworks.com/matlabcentral/answers/597430-automatically-naming-mat-files-with-variable-names, https://www.mathworks.com/matlabcentral/answers/597430-automatically-naming-mat-files-with-variable-names#answer_498064, https://www.mathworks.com/matlabcentral/answers/597430-automatically-naming-mat-files-with-variable-names#comment_1018354, https://www.mathworks.com/matlabcentral/answers/597430-automatically-naming-mat-files-with-variable-names#answer_498055, https://www.mathworks.com/matlabcentral/answers/597430-automatically-naming-mat-files-with-variable-names#comment_1018315, https://www.mathworks.com/matlabcentral/answers/597430-automatically-naming-mat-files-with-variable-names#comment_1018339. thanks 1 Comment Save variables from workspace to file - MATLAB save - MathWorks now i want to use this mat file to save similarly names variables in another mat file. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. At the moment I am able to save the .mat file in a specific folder but I am not able to save it with the desired variable name. The matfile function constructs a matlab.io.MatFile object that corresponds to a MAT-File. Select the China site (in Chinese or English) for best site performance. The way I construct filename, it is indicated as char, so the line where I want to save the matrix "grouped" throws the following error: fullMatFileName = fullfile(folder, baseFileName); http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F. File path, returned as character vector containing the fully qualified path to the MAT-file. Other MathWorks country sites are not optimized for visits from your location. Select the China site (in Chinese or English) for best site performance. Based on your location, we recommend that you select: . %03d instead of %d when generating your save_name variable. Save Entire Variable to Existing MAT-file, matObj = matfile(filename,'Writable',isWritable), Save and Load Parts of Variables in MAT-Files. varlist = who(matObj) lists alphabetically all variables in the MAT-file associated with matObj. Theme Copy myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation save Data.mat myData 4 Answers Sorted by: 6 Strings are just vectors of characters. Description example save (filename) saves all variables from the current workspace in a binary MATLAB file (MAT-file) named filename. string - matlab iterative filenames for saving - Stack Overflow https://www.mathworks.com/matlabcentral/answers/241686-saving-files-in-a-loop-with-different-names, https://www.mathworks.com/matlabcentral/answers/241686-saving-files-in-a-loop-with-different-names#answer_191845, https://www.mathworks.com/matlabcentral/answers/241686-saving-files-in-a-loop-with-different-names#answer_191797, https://www.mathworks.com/matlabcentral/answers/241686-saving-files-in-a-loop-with-different-names#comment_308870, https://www.mathworks.com/matlabcentral/answers/241686-saving-files-in-a-loop-with-different-names#comment_308879. How to save a file with name saved in a variable - MathWorks Access specific parts of a variable in a MAT-file using the MAT-file object. You can also select a web site from the following list. Learn more about save(), loop, variable Accelerating the pace of engineering and science. If you need the variable names for some reason, you can use the fieldnames function. Something like: 'I want to save the variable under the name:', thank you that worked only had to change order like this save('Data.mat', '-struct','S'). Save data to a subset of a variable y in the file myFile2.mat using the MAT-file object. Is it possible? The MAT-file object allows you to access and change variables directly in a MAT-file, without having to load the variables into memory. THIS WORKED BEAUTIFULLY THANK YOU. struct2table may already do what you need. Can you make an attack with a crossbow and then prepare a reaction attack using action surge without the crossbow expert feat? matObj = matfile(filename) creates a matlab.io.MatFile object connected to the MAT-file specified by filename. For example, to convert an existing MAT-file named durer.mat to Version 7.3, call: Using the end keyword as part of an index causes MATLAB to load the entire variable into memory. Get array dimensions of variable in MAT-file. However, manually entering the name for upwards of 16,000 images sounds absolutely awful. Choose a web site to get translated content where available and see local events and offers. Select the China site (in Chinese or English) for best site performance. Thanks. Here I want to read the file name and replace the last two characters with zero. Would you please guide me how to write Excel files whose names are value of a variable, e.g. oh, you've got problem with filename too. It is slow and buggy. The output allDims is a 1-by-m vector, where m = ndims(variable). the problem is as indicated with filename. You were really close. The next four lines are just pointers back to the original data. For this case, I think the problem is the syntax for save. Not the answer you're looking for? MATLAB adds a variable named y to the file. Based on your location, we recommend that you select: . https://www.mathworks.com/matlabcentral/answers/78446-how-can-i-create-and-save-a-variable-that-contains-filename, https://www.mathworks.com/matlabcentral/answers/78446-how-can-i-create-and-save-a-variable-that-contains-filename#answer_88170, https://www.mathworks.com/matlabcentral/answers/78446-how-can-i-create-and-save-a-variable-that-contains-filename#comment_153807, https://www.mathworks.com/matlabcentral/answers/78446-how-can-i-create-and-save-a-variable-that-contains-filename#comment_153814, https://www.mathworks.com/matlabcentral/answers/78446-how-can-i-create-and-save-a-variable-that-contains-filename#answer_88172. Select the China site (in Chinese or English) for best site performance. If you're using a sufficiently recent release of MATLAB, you can combine, You can even get fancier with implicit expansion. MATLAB loads the entire variable, topo, into the workspace. https://www.mathworks.com/matlabcentral/answers/449422-how-to-generate-a-file-name-by-combining-variable-characters-based-on-the-input-of-the-matlab, https://www.mathworks.com/matlabcentral/answers/449422-how-to-generate-a-file-name-by-combining-variable-characters-based-on-the-input-of-the-matlab#answer_364819, https://www.mathworks.com/matlabcentral/answers/449422-how-to-generate-a-file-name-by-combining-variable-characters-based-on-the-input-of-the-matlab#answer_364820, https://www.mathworks.com/matlabcentral/answers/449422-how-to-generate-a-file-name-by-combining-variable-characters-based-on-the-input-of-the-matlab#answer_364825. assuming that the "name" is the only string to contain the '_' underscore character: https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html, https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists. filename = fullfile(destination, [x5_1_1_0. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Check the following link: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval Determine the size of a variable, and then calculate the average of each column. I need to save the output of my script in a .mat file which have as name the name I extract from the cell of an excel file. The script listed above is the only code that runs in matlab itself. Find the treasures in MATLAB Central and discover how the community can help you! Note: Do not call size with the syntax size(matObj.variable). Enable write access to the MAT-file, myFile.mat, when you create the object. Select the China site (in Chinese or English) for best site performance. save (MATLAB Function Reference) - Mathematics For example, if your MAT-file contains function handle myfunc, the syntax m.myfunc() attempts to index into the function handle, and does not invoke the function. saving files in a loop with different names - MATLAB Answers - MATLAB Reload the page to see its updated state. I need to save the output of my script in a .mat file which have as name the name I extract from the cell of an excel file. Select the China site (in Chinese or English) for best site performance. Specify isWritable as true or false. For each element that is changed in any of the input variables you need to build a name. Optionally, returns the list in cell array varlist. S = load (filename); That way, all variables in the mat file are stored as the fieldnames of S. This means it is always clear where variables came from. testdata_i where i is a variable? Making statements based on opinion; back them up with references or personal experience. You can construct the loop to either loop through and generate all the names first and store in cellstr or string array or, just build the filename inside the overall calculation loop at the point you're ready to use it. Any and all help would be greatly appreciated, I am super stuck at the moment. Maybe, a simples way to answer that need is to do the following: I tried that. you should use braces instead of parentheses for a cell array to get its value, when you use parentheses you refer to a cell with one dimension. Other MathWorks country sites are not optimized for visits from your location. Unable to complete the action because of changes made to the page. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Write Query to get 'x' number of rows in SQL Server. Accepted Answer: Adam Danz Would you please guide me how to write Excel files whose names are value of a variable, e.g. What are the white formations? This syntax loads the entire contents of the variable into memory. example Description example save (filename) saves all variables from the current workspace in a binary MATLAB file (MAT-file) named filename. If the file does not exist, matfile creates a Version 7.3 MAT-file on the first assignment to a variable. Nevertheless, this is not working and I would like to achieve the following outcome in this example: output_file= output_file_abc_value0.90_20_10_-5_60_s4. To be clear, I'm not running a loop in matlab, I'm using Slidebook (image capturing and processing software, where my images are stored) to perform the "loop"ing aspect, simply because I have to pull each of the 6 variables from each image contained within slidebook. [dim1,,dimN] = size(matObj,variable) returns the sizes of each dimension in separate output variables dim1,,dimN. Choose a web site to get translated content where available and see local events and offers. Now I want to save this array in a .mat file but I want to change the variable name. You can load the .mat file holding the list of variable in a struct by using load then you can extract the names of the variables using the fieldnames function 'output_file_%s_value%0.2f_%03d_s%03d.txt', % use fixed width with leading zeros so will sort numerically. Can I safely temporarily remove the exhaust and intake of my furnace? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. My workflow currently involves importing each image's six variables into matlab, then using, save(['H:\My_Directory\Mat_Files\' name]). It has variables say var1="loop_no", var2="phase", var3="flow". Does this solution result in making a copy of the data in memory, or is matlab smart enough to avoid this? For a project I would like to make file names based on the input of my matlab code. To do this correctly, you need to use the "functional" form of save: Theme Copy fname = 'foobar'; save (fname, 'variable'); In fact, it is true in general that the following two lines are equivalent: Theme Copy command str1 str2 str3 command ('str1', 'str2', 'str3') Theme Copy myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation save Data.mat myData 2 Answers Sorted by: 1 It would be helpful if you provide the error message when it doesn't work. I am now using this function: Theme Copy save ('filepath','variablename') Unable to complete the action because of changes made to the page. After each loop, the data is to be saved within a .mat file using the 'save' command. I also want column headings in the first row of each column. Using a preexisting string as a file name is OK but if you're dynamically naming that string you could be entering into some pitfalls. Unable to complete the action because of changes made to the page. You can also select a web site from the following list. Choose a web site to get translated content where available and see local events and offers. Reload the page to see its updated state. Are Prophet's "uncertainty intervals" confidence intervals or prediction intervals? Access specific parts of a variable in a MAT-file using the MAT-file object. Sudipta Ray on 30 Jun 2015 Save them as elements of a cell array instead, when you first create them. This saves my data in Data.mat file but with variable name myData. Thank you Adam and Madhan for your quick responses. Other MathWorks country sites are not optimized for visits from your location. Read the variable topo from the file using the MAT-fie object. Other MathWorks country sites are not optimized for visits from your location. Asking for help, clarification, or responding to other answers. Find the treasures in MATLAB Central and discover how the community can help you! save('2_back_gp_1_trial_ str2num(a(i))_sub_1.mat',' b(i)'), "How to save mat file using save() with a different variable name using for loop". Enable write access by setting Writable to true. For sparse arrays in a MAT-file, the MAT-file object: Supports reading a subset of a sparse array by indexing. Another complexity is that the length of the "b_value"-vector (in this case 4 values, but it could also be 2 or 10 values) changes based on the input of the program. Based on your location, we recommend that you select: . You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. What is the best way to loan money to a family member until CD matures? You just forgot to use the filename variable. Web browsers do not support MATLAB commands. How to generate a file name by combining variable - MathWorks Or name the file with information contained within variable c? Data is a matrix whose values is decided in another loop. You can also select a web site from the following list. Based on your location, we recommend that you select: . . How to save mat file using save() with a. Create a MAT-file object for your file.
