Code Generation Readiness - strsplit() and datenum() are unsupported function calls?
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Hello to all, I am curious about Code Generation Readiness. I tried to check a file with these lines:
function teststrplit()
fileName = 'xxx_yyyyyyy_20141205.mat';
strsplit(fileName,'_');
datenum(fileName(13:end-4),'yyyyMMdd');
And it is evaluated with readiness score of 3 because of "Unsupported MATLAB function calls". Why these functions are evaluated as less readable? I got invocation for both, strsplit and datenum. I am working in Linux, MATLAB R2015b. Thanks for explanation or comments.
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Walter Roberson
2015-9-18
strsplit involves cell arrays. There are a number of restrictions on cell arrays for code generation; see http://www.mathworks.com/help/simulink/ug/cell-array-restrictions-for-code-generation.html
Have you considered using indexing?
filedate = fileName(find(fileName == '_', 1, 'last'):end-4);
I am not sure why datenum() is not supported for code generation. Since you have a fixed date format, you could write some small code to do the conversion. Look up the month number in a cumulative-days-before list, add the day number, pre-calculate the serial date for the beginning of the first year you want to consider, add that to 365 times the difference between the file year and the current year, make leap-year corrections.
2 个评论
Petr Dvorak
2015-9-23
Walter Roberson
2015-9-23
strsplit is defined as returning a variable-length cell array, since you do not know ahead of time how many pieces the string will split into.
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