Question

I want to load multiple variables into one .mat file at the end of a process loop. I have a simple line of code :

save draw.mat Output

but I cannot work out a way to code ‘use the name given by variable X’ instead of ‘Output’, so that I can loop the process and save multiple variables in draw.mat

So then

X = 'Chocolate'

and the Variable name is saved as Chocolate.

I am sure it is simple but I cannot find a solution on here!

Answer 1

You can use the -struct form of the save command. You build a struct with fields holding the names of the variables in the resulting .mat-file.

Example:

s = struct();
s.VariableOne = 1;
s.VariableTwo = 2;
save draw.mat -struct s;

The file draw.mat will now hold two 1×1 double variables with names “VariableOne” and “VariableTwo”.

You can also build the struct in one single command:

s = struct('VariableOne', {1}, 'VariableTwo', {2});

Or you can use the cell2struct function:

data = {1,2};
names = {'VariableOne', 'VariableTwo'};
s = cell2struct(data(:), names(:), 1);