converting symbolic to string and printing to a file without 'piecewise' expression

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Kyle Stanhouse 2011-5-25

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I am attempting to print a symbolic expression to a file as a string. This piece of code worked correctly for me and then for some unknown reason didn't:

fprintf(fid,'''%s'';\n\n',char(C(i,j,2)));

By working correctly i mean that it printed out without a 'piecewise' in front of it...Does anyone know why its all of a sudden printing the output as 'piecewise'.

Thanks

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Walter Roberson 2011-5-25

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What does disp(C) show you ? If there is a conditional portion to the expression, it should show you piecewise(). Unless, that is, you want the formatted multi-line version that shows one case per line.

Possibly evalc(C(i,j,2)) would be useful for you

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Kyle Stanhouse 2011-5-25

i guess i must have absentmindedly changed the file that computes and prints C, thats the only explanation....

Walter Roberson 2011-5-25

If you are printing a large symbolic matrix to a file so that you can use eval(), then you should consider instead using matlabFunction() to convert the matrix to a function handle or to write the function body to a file.

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