matlab save file with variable namematlab save file with variable name

Reload the page to see its updated state. Write Query to get 'x' number of rows in SQL Server. Choose a web site to get translated content where available and see local events and offers. If filename exists, save overwrites the file. MATLAB loads the entire variable, topo, into the workspace. The MAT-file object allows you to access and change variables directly in a MAT-file, without having to load the variables into memory. matObj = matfile(filename) creates a matlab.io.MatFile object connected to the MAT-file specified by filename. Memory errors. Optionally, returns the list in cell array varlist. Data is a matrix whose values is decided in another loop. Save data to a subset of a variable y in the file myFile2.mat using the MAT-file object. Unable to complete the action because of changes made to the page. save (save_name,'X','Y') That way you'll create one file with the X and Y data each ID-Condition combination. Specify isWritable as true or false. Sudipta Ray on 30 Jun 2015 's advice. If filename does not include an extension, matfile appends .mat. Description save , by itself, stores all workspace variables in a binary format in the file named matlab.mat. https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#answer_94084, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_163896, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_373531, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_644511, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#answer_384821, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_790905, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#answer_94081, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_163886, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_163890, https://www.mathworks.com/matlabcentral/answers/84518-save-variables-in-mat-files-with-desired-name#comment_163891. 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. Save a matrix .mat in a specific folder with a variable name - MATLAB 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. Other MathWorks country sites are not optimized for visits from your location. For very large variables, this load operation results in Out of Memory Specify the variable in the MAT-file using dot notation similar to accessing fields of structure arrays. MATLAB inserts the 20-by-20 array into the elements of y specified by the indices (81:100,81:100). where "name" is manually entered each time. Data is a matrix whose values is decided in another loop. Accelerating the pace of engineering and science. You may receive emails, depending on your. Create a MAT-file object for your file. selectedDim = size(matObj,variable,dim) returns the size of the specified dimension. 584), Improving the developer experience in the energy sector, Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood. Accelerating the pace of engineering and science. Choose a web site to get translated content where available and see local events and offers. Create a MAT-file containing an array and then add another array to the file using the MAT-file object. Based on your location, we recommend that you select: . The script listed above is the only code that runs in matlab itself. To learn more, see our tips on writing great answers. If you only have those seven variables in the workspace then most likely you can identify the "name" by some feature, e.g. Select the China site (in Chinese or English) for best site performance. The MAT-file object does not support indexing into: The MAT-file object does not support evaluating function handles using the m output. Description example save (filename) saves all variables from the current workspace in a MATLAB formatted binary file (MAT-file) called filename. you should pass the string of the name of your variable, use this: that does NOT solve the problem, same error message. Efficient partial loading and saving requires Version 7.3 MAT-files. For example, you can save data to a subset of a variable in a MAT-file or read a subset of a variable into the MATLAB workspace. errors. +1, SHAWN this answer , answered your question already. THIS WORKED BEAUTIFULLY THANK YOU. You can load or save parts of variables. Choose a web site to get translated content where available and see local events and offers. What are these planes and what are they doing? The save function is located at the end of a for loop and, therefore, it is needed to be saved with a variable name changing each loop iteration. If filename exists, save overwrites the file. What would happen if Venus and Earth collided? example Automatically naming mat files with variable names - MATLAB Answers Unfortunately badly written code does this, even sometimes code from apparently reputable third-party sources. allDims = size(matObj,variable) returns the size of each dimension of the specified variable in the file corresponding to matObj. example save (filename,variables) saves only the variables or fields of a structure array specified by variables. Save variables from workspace to file - MATLAB save - MathWorks Other MathWorks country sites are not optimized for visits from your location. Name of the MAT-file, specified as a character vector or string scalar. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Where variable x5_1_1_0 is the image name and will change with each image. Accelerating the pace of engineering and science. Reload the page to see its updated state. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Find the treasures in MATLAB Central and discover how the community can help you! MathWorks is the leading developer of mathematical computing software for engineers and scientists. This is the code I have that needs some adjustments. For example, you can access the source file path of the MAT-file connected to the MAT-file object mObj using the syntax mObj.Properties.Source. What are the white formations? That rather poor data design that seems to be tempting the use of dynamic variable names: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval. Now I want to save values of myData in .mat file but I want to save the value under a variable name given via input function. Then save all variables or a list of variables using, to generate filenames with numbered filenames, like. Based on your location, we recommend that you select: . Determine the size of a variable, and then calculate the average of each column. However since I was calling this inside a function I used 'caller' instead of 'base' but my .m function file has nested functions in it. Reload the page to see its updated state. 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. files=dir (''); for the file location. 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. filename = fullfile(destination, [x5_1_1_0. Find the treasures in MATLAB Central and discover how the community can help you! false MAT-file object has read-only access to the MAT-file. save variables in .mat files with desired name. - MATLAB Answers Is there a way to name the mat file after a name-changing variable I imported into matlab without having to manually enter the name? Read a subset of array y into a new workspace variable, z. MATLAB reads the 10-by-10 subarray specified by the indices (85:94,85:94) from the MAT-file into workspace variable z. If filename exists, save overwrites the file. 0 . You may receive emails, depending on your. However, manually entering the name for upwards of 16,000 images sounds absolutely awful. example save (filename,variables) saves only the variables or fields of a structure array specified by variables. 1 Link 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. When accessing parts of variables in MAT-files by indexing: Linear indexing is not supported. Save y to the MAT-file using the MAT-file object. Select the China site (in Chinese or English) for best site performance. Reload the page to see its updated state. Check the following link: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval Again, thank you so much, you have saved me thousands of hours. Or name the file with information contained within variable c? 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. Choose a web site to get translated content where available and see local events and offers. How do precise garbage collectors find roots in the stack? I strongly suggest that you use. The default value is true for new files, false for existing files. Therefore, modifying the object via its handle in the workspace from which the object was saved does not modify the saved handle object. Open the sample MAT-file topography.mat. Specify the variable in the MAT-file using dot notation similar to accessing fields of structure arrays. 2 Answers Sorted by: 1 It would be helpful if you provide the error message when it doesn't work. I want to create a simple two column text file, where the first column is the data from an nx1 matrix and the second column is a different n x 1 matrix. example For this case, I think the problem is the syntax for save. I am now using this function: Theme Copy save ('filepath','variablename') You can also select a web site from the following list. Unable to complete the action because of changes made to the page. The cause of your difficulties lies in the unfortunate design decision to force meta-data into the variable names. save - Matlab saving a .mat file with a variable name - Stack Overflow Where in the Andean Road System was this picture taken? Determine the size of the variable, stocks, in stocks.mat. 1 Link Translate Dynamically naming variables is not recommended. Choose a web site to get translated content where available and see local events and offers. Unable to complete the action because of changes made to the page. Get list of variables in MAT-file, with sizes and types. So if you want to iteratively create filenames here's an example of how you would do it: for j = 1:10, filename = ['string_new.' num2str (j) '.mat']; disp (filename) end The above code will create the following output: Learn more about variable, name, bad idea, dynamic variable names., anti-pattern, antipattern, evil . You can also select a web site from the following list. https://www.mathworks.com/matlabcentral/answers/1664564-how-to-save-mat-file-using-save-with-a-different-variable-name-using-for-loop, https://www.mathworks.com/matlabcentral/answers/1664564-how-to-save-mat-file-using-save-with-a-different-variable-name-using-for-loop#answer_910959. Asking for help, clarification, or responding to other answers. Accelerating the pace of engineering and science. Access and change variables in MAT-file without loading file into Find centralized, trusted content and collaborate around the technologies you use most. Meta-data is data, and data should be stored, https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval. How to exactly find shift beween two functions? http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F. Unable to complete the action because of changes made to the page. Saving .mat file with different names - MATLAB Answers - MathWorks The parametric sweep is for not more than 10 values, so the last part is not an issue. Can I safely temporarily remove the exhaust and intake of my furnace? Now I want to save this array in a .mat file but I want to change the variable name. For very large variables, this load operation results in Out XProtect support currently under Catalina. This saves my data in Data.mat file but with variable name myData. fisher_matrix is just matrix of doubles, sixCenters is a 6x1 cell, containing charachters like "NYU", "Lond".. Alternatively, you can enable write access after you create the MAT-file object by setting the Writable property. Any and all help would be greatly appreciated, I am super stuck at the moment. Select the China site (in Chinese or English) for best site performance. Matlab uses copy-on-write and does not make a copy unless changes are made to one of the variables. So the name is saved inside variable 'Name', and it changes every time inside the loop ( every time it takes it from a different excel work page). Does the center, or the tip, of the OpenStreetMap website teardrop icon, represent the coordinate point? Not the answer you're looking for? Based on your location, we recommend that you select: . Other MathWorks country sites are not optimized for visits from your location. This is the code I have that needs some adjustments. Maybe somebody can help me with the following problem. Assigning complex values to indexed portions of a real array is not supported. Enable write access by setting Writable to true. You may receive emails, depending on your. It has variables say var1="loop_no", var2="phase", var3="flow". for i=1,.,5 filename = sprintf ('%s_%d','testdata",i) Now I want to save this array in a .mat file but I want to change the variable name. Would you please guide me how to write Excel files whose names are value of a variable, e.g. Temporary policy: Generative AI (e.g., ChatGPT) is banned, Matlab saving file as name defined within other variable, How to store variables from different .mat files into separate matrices, importing variables from one file to another MATLAB, How to read mat file and store in a variable, Append data to mat file with same variable, MATLAB - store variables with a specific prefix in .mat file, Accessing variables from different files in matlab, How to save some variable values in a file, Geometry nodes - Material Existing boolean value. You can also select a web site from the following list. Get array dimensions of variable in MAT-file. Based on your location, we recommend that you select: . So rewrite that section of your code as: and also you need to do what I said before: You may receive emails, depending on your. The output allDims is a 1-by-m vector, where m = ndims(variable). 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 Other MathWorks country sites are not optimized for visits from your location. Connect and share knowledge within a single location that is structured and easy to search. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. details = whos(matObj) returns information about all variables in the MAT-file associated with matObj. Accepted Answer: Image Analyst Hi My code looks something like: Theme Copy for k = 1:length (sixCenters) grouped (:,:,k) = fisher_matrix; filename = strcat (sixCenters (k),'.mat'); save (filename,grouped); continue; end end fisher_matrix is just matrix of doubles, sixCenters is a 6x1 cell, containing charachters like "NYU", "Lond".. Compute the average of each column of the variable stocks. testdata_i where i is a variable? Unable to complete the action because of changes made to the page. Reload the page to see its updated state. false Disable write access to the MAT-file from the MAT-file object. 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. You can also select a web site from the following list. 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') declval<_Xp(&)()>()() - what does this mean in the below context? Access and change variables in MAT-file without loading file into memory. Learn more about save(), loop, variable I am running a for loop for parametric sweep. Create a MAT-file object connected to the existing 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. Select the China site (in Chinese or English) for best site performance. File name as value of a variable - MATLAB Answers - MathWorks For example, you can save data to a subset of a variable in a MAT-file or read a subset of a variable into the MATLAB workspace. Automatically naming mat files with variable names - MATLAB Answers Other MathWorks country sites are not optimized for visits from your location. How to save a file with name saved in a variable - MathWorks The matfile function constructs a matlab.io.MatFile object that corresponds to a MAT-File. matObj = matfile(filename,'Writable',isWritable) enables or disables write access to the file. Theme Copy myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation save Data.mat myData of then you can extract the names of the variables using the, the last step is to save this list of varaibles with the functnio. 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'). test1.mat, that should contain a1, then test2.mat should contain a2 and so on. Unable to complete the action because of changes made to the page. Based on your location, we recommend that you select: . Other MathWorks country sites are not optimized for visits from your location. 'output_file_%s_value%0.2f_%03d_s%03d.txt', % use fixed width with leading zeros so will sort numerically. Choose a web site to get translated content where available and see local events and offers. Find the treasures in MATLAB Central and discover how the community can help you! MATLAB Answers; File Exchange; Cody; . Is it possible? https://www.mathworks.com/matlabcentral/answers/468666-file-name-as-value-of-a-variable, https://www.mathworks.com/matlabcentral/answers/468666-file-name-as-value-of-a-variable#answer_380600, https://www.mathworks.com/matlabcentral/answers/468666-file-name-as-value-of-a-variable#comment_717845, https://www.mathworks.com/matlabcentral/answers/468666-file-name-as-value-of-a-variable#comment_717869. details = whos(matObj,VarName1,,VarNameN) returns information about the specified variables. Select the China site (in Chinese or English) for best site performance. You can also select a web site from the following list. Copy. 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. Accelerating the pace of engineering and science. 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". 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. If you have more than 9999 iterations then increase the 4 to the maximum number of digits you need. Find the treasures in MATLAB Central and discover how the community can help you! Save Entire Variable to Existing MAT-file, matObj = matfile(filename,'Writable',isWritable), Save and Load Parts of Variables in MAT-Files. Find the treasures in MATLAB Central and discover how the community can help you! 4 Kommentare. Based on your location, we recommend that you select: . Thanks for contributing an answer to Stack Overflow! 4 Answers Sorted by: 6 Strings are just vectors of characters. Find the treasures in MATLAB Central and discover how the community can help you! Access MAT-file object properties using the syntax ObjectName.Properties.PropertyName, where PropertyName is the name of a property. Based on your location, we recommend that you select: . oh, you've got problem with filename too. Based on your location, we recommend that you select: . for i=1:length (files) [pathname,filename,extension] = fileparts (files (i).name); filename=filename (1:end-2) how do I append two zeros to the file name? 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. now i want to use this mat file to save similarly names variables in another mat file. 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. 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. Accelerating the pace of engineering and science. How to save mat file using save() with a. example save (filename,variables) saves only the variables or fields of a structure array specified by variables. I am fairly new to matlab, and have not been able to figure this out for the life of me. My workflow currently involves importing each image's six variables into matlab, then using, save(['H:\My_Directory\Mat_Files\' name]). You were really close. The next four lines are just pointers back to the original data. You must specify indices for all dimensions. example 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. Maybe, a simples way to answer that need is to do the following: I tried that. true MAT-file object has write access to the MAT-file. Generate another 15-by-15 array, y. No it is does not copy. Thanks. thanks 1 Comment Web browsers do not support MATLAB commands. Save data to .txt file - MATLAB Answers - MATLAB Central - MathWorks For each element that is changed in any of the input variables you need to build a name. Here I want to read the file name and replace the last two characters with zero. https://www.mathworks.com/matlabcentral/answers/351068-how-to-save-a-file-with-name-saved-in-a-variable, https://www.mathworks.com/matlabcentral/answers/351068-how-to-save-a-file-with-name-saved-in-a-variable#comment_473565, https://www.mathworks.com/matlabcentral/answers/351068-how-to-save-a-file-with-name-saved-in-a-variable#comment_473568. Other MathWorks country sites are not optimized for visits from your location. Save them as elements of a cell array instead, when you first create them. Select the China site (in Chinese or English) for best site performance. Making statements based on opinion; back them up with references or personal experience. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Description example save (filename) saves all variables from the current workspace in a binary MATLAB file (MAT-file) named filename. 1 Answer Sorted by: 0 You can exploit the dynamic field naming of the struct data type. What is the best way to loan money to a family member until CD matures? struct2table may already do what you need. %03d instead of %d when generating your save_name variable. Do you want to open this example with your edits? Based on your location, we recommend that you select: . Write access status of the MAT-file object, returned as either true or false. Accelerating the pace of engineering and science. 1 Link Commented: Venkatanarasimha Hegde on 17 Mar 2023 Accepted Answer: Jos-Luis How do I save data to a txt file? Find the treasures in MATLAB Central and discover how the community can help you! I would like to create and save a variable that contains the file number given in a string, for example: How can I now save this variable a1 in a mat file (without need to write a1, because this should work in a for loop, where 1 in incremented) ? 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. I have several thousand images that each have six variables that I need to save to individual mat files. Unable to complete the action because of changes made to the page. Choose a web site to get translated content where available and see local events and offers. Enable write access to the MAT-file, myFile.mat, when you create the object. For example, the following code only stores a single copy. 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. MathWorks is the leading developer of mathematical computing software for engineers and scientists. In the above, the other variables that are single-valued are inherent in the definition of the anonymous function at the time it is defined. But this is not a good idea, if you explain what you want to achieve, maybe there are better ways. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. what should xxx be to do that ? Save variables from workspace to file - MATLAB save - MathWorks