How to save matlab workplace variables by including original file names

1 view (last 30 days)
Hi I would like to know how I can save the matlab output files (i.e. matlab workplace variables), by including original file name.
e.g. I open a file (filename.matlab) with (load filename.matlab). Then I run a code to do calculation and I get some workplace variables (e.g. flow, pressure). I want to save those variables as filename_flow.mat and filename_pressure.mat.
I will use the same code on different filename, so I would like to know how I can save my variables as mentioned above (i.e. including the originalfile name)?

Accepted Answer

Image Analyst
Image Analyst on 25 Jan 2016
Not sure what you're asking, but I'll take a guess.
You can save both to a single file called "yourMfilename.mat", where yourMfilename is whatever your filename is. For example, if your m-file is called test.m, then you can get test.mat in your code like this using mfilename():
fullMatFileName = sprintf('%s.mat', mfilename('fullpath')); % Get base name from m-file name.
save(fullMatFileName , 'flow', 'pressure');
Or you can save each variable to its own .mat file if you want:
fullMatFileName = sprintf('%s_flow.mat', mfilename('fullpath')); % Get base name from m-file name.
save(fullMatFileName , 'flow');
fullMatFileName = sprintf('%s_pressure.mat', mfilename('fullpath')); % Get base name from m-file name.
save(fullMatFileName, 'pressure');
  3 Comments
Image Analyst
Image Analyst on 25 Jan 2016
Try this:
% Have user browse for a file, from a specified "starting folder."
% For convenience in browsing, set a starting folder from which to browse.
startingFolder = 'C:\Program Files\MATLAB';
if ~exist(startingFolder, 'dir')
% If that folder doesn't exist, just start in the current folder.
startingFolder = pwd;
end
% Get the name of the file that the user wants to use.
defaultFileName = fullfile(startingFolder, '*.mat');
[baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
if baseFileName == 0
% User clicked the Cancel button.
return;
end
% Get the name of the input .mat file.
fullInputMatFileName = fullfile(folder, baseFileName)
% load(fullInputMatFileName);
% Get it without the extension
[~, baseNameNoExt, ~] = fileparts(baseFileName)
% Get the name of the two output .mat files.
baseFileName = sprintf('%s_flow.mat', baseNameNoExt);
fullOutputMatFileName1 = fullfile(folder, baseFileName)
baseFileName = sprintf('%s_pressure.mat', baseNameNoExt);
fullOutputMatFileName2 = fullfile(folder, baseFileName)
Then, with those two filenames, call save() twice like I already showed you.
save(fullOutputMatFileName1, 'flow');
save(fullOutputMatFileName2, 'pressure');

Sign in to comment.

More Answers (0)

Categories

Find more on Language Fundamentals in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!