Reading variables from workspace

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Hi- I was wondering if there is a way to read all variables from workspace ? I want to make a .mat file so if I run my simulation its spitting 20 variables in work space. I want to write these in a mat file e.g.
data = [a b c d f r g];
save data.mat data
Is there a way in which program read all variables from workspace?
Thank you
  1 Comment
Star Strider
Star Strider on 9 Sep 2015
The code you posted should work, and will save your ‘data’ matrix to your ‘data.mat’ file.
What is not working as you want it to?

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Accepted Answer

Hamoon
Hamoon on 9 Sep 2015
If you want to save all the variables from workspace to a file named data.mat you just need this:
save('data')
  3 Comments
Hamoon
Hamoon on 11 Sep 2015
You chose my answer as accepted answer, thank you, but be aware, Walter Robinson's answer (the next answer) is the best way to reach your goal, my answer is just for your current work, and it's not an efficient way to reach your goal generally, but Walter's is good and efficient for this matter. If you can deal with programming part of that concept, please try that one.

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More Answers (2)

Walter Roberson
Walter Roberson on 9 Sep 2015
Do not create those variables dynamically in the workspace. Create fields of a structure. You can then save to a .mat file as individual variables using the save -struct option.
If you have a .mat file with a number of variables and you want to work on each of them, then use
datastruct = load('YourFile.mat');
Now each of the variables in the .mat file will appear as fields in datastruct. You can find out what is there using fieldnames(datastruct) . If you want to apply the same operation to each variable you can do that using structfun()
  1 Comment
amberly hadden
amberly hadden on 10 Sep 2015
Thank you Walter I always appreciate your help

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Sulaymon Eshkabilov
Sulaymon Eshkabilov on 4 Feb 2019
Here is an alternative (simpler) solution to the problem:
% save all variables in the workspace:
save('MYdata.mat');
% Store the variable names from mydat.mat in a cell: MYvars
MYvars = who('-file', 'MYdata.mat');
for k = 1:length(MYvars)
disp(MYvars{k})
end

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