save variables in .mat files with desired name.
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Sunil Shahi
il 11 Ago 2013
Commentato: Eleanna Kritikaki
il 28 Gen 2020
I have a function where I do my calculation to get A cell or array. Now I want to save this array in a .mat file but I want to change the variable name.
myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation
save Data.mat myData
This saves my data in Data.mat file but with variable name myData. 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. Something like:
myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation
newName = input('I want to save the variable under the name:', 's');
save Data.mat ???
I hope that make sense
Thanks
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Risposta accettata
Jan
il 12 Ago 2013
Modificato: Jan
il 12 Ago 2013
myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation
newName = input('I want to save the variable under the name:', 's');
S.(newName) = myData;
save('Data.mat', '-struct', 'S') % EDITED
3 Commenti
Richard Crozier
il 17 Giu 2016
Does this solution result in making a copy of the data in memory, or is matlab smart enough to avoid this?
John Paden
il 30 Nov 2018
No it is does not copy. Matlab uses copy-on-write and does not make a copy unless changes are made to one of the variables. 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". When any one of the copies is written to, the copy that is written to will be fully copied at that point, but all the other copies that are not written to will continue to point back to the original copy. For example, the following code only stores a single copy. The first line of code actually uses memory to store the variable. The next four lines are just pointers back to the original data.
>> test = zeros(250e6,1);
>> s.data = test;
>> C{1} = test;
>> C{2} = test;
>> C{3} = s.data;
Più risposte (2)
Bruno
il 25 Lug 2019
Maybe, a simples way to answer that need is to do the following:
fname = sprintf('Data.mat', myData);
save(fname)
Hope it can help others.
Azzi Abdelmalek
il 11 Ago 2013
myData = [1 2 3 4 5 6 7 9];
newName = input('I want to save the variable under the name:', 's');
assignin('base',newName,myData)
save('Data.mat',newName)
3 Commenti
Jan
il 12 Ago 2013
Avoid to create variables dynamically by assignin or eval. There is always a better solution.
Azzi Abdelmalek
il 12 Ago 2013
myData = [1 2 3 4 5 6 7 8 9]; %data from my calculation
newName = input('I want to save the variable under the name:', 's');
a.(newName)=myData;
save('Data.mat','-struct','a',newName)
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