sgolayfilt function question ask
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I use the function "sgolayfilt" to filter my data.
filter_grade=sgolayfilt(grade,4,41); The grade is 11925*1 double data.
But the result shows "??? Undefined function or method 'sgolayfilt' for input arguments of type 'double'". What should I do?
Thanks, Joanne
回答（2 个）
Honglei Chen
2012-10-30
Do you have Signal Processing Toolbox installed? You can check if you have it by running
ver
Also, what does
which sgolayfilt
return?
You need either the Signal Processing Toolbox, or you can use the faster: FEX: fSGolayFilt.mex, which does not require the SPT.
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