create string with characters in char array

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Francis Dick
Francis Dick 2018-3-16
评论： Francis Dick 2018-3-16
Hi,
I have a char array, which I want to use to name a .mat file into which i will save a couple of variables:
Name Size Bytes Class Attributes
str 1x4 8 char
str = F024
str contains only the characters: 'F024'. I want to use the 'save' function to save some variables with the filename being F024. I have tried using:
save(str,variable1,variable2,'-append');
however, an error is returned stating that the argument must contain a string.
Is there a way to convert the char array to a string? I don't want to manually enter the filename as it would mean that the data processing I am doing would take far longer.
Unfortunately I cannot use convertCharsToStrings as my university is running MATLAB v.R2016a.
Thanks.

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Guillaume
Guillaume 2018-3-16
The problem is not with your str variable, which is perfectly fine, but with the variable1 and variable2 which must be a string or char array containing the names of the variables, not the variables themselves, i.e.:
save(str, 'variable1', 'variable2', '-append');
not
save(str, variable1, variable2, 'append');

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