Hi,I have a problem in Matlab programme,I want to calculate the derivative of a expression by matlab,but there are some abstract functions in that expression.(adsbygoogle = window.adsbygoogle || []).push({});

for example:f=R(t)*cos(t),I want calculate d=diff(f,t),but I don't know how to deal with the abstract function R(t),I hope I can get this kind of result:d=dRt*cos(t)-R*sin(t),but how should I design the programme?

thank you for your help.

neptunecs.

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# A problem of a Matlab programme

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