MATLAB Answers


how to implement cartesian coordinates

Asked by kash
on 29 Mar 2013

I have a image

which consists of cartesian coordinates,plz tell how to implement these coordinates,which function must be used

Kindly help


What is the context for that? It does not appear to be general Cartesian coordinates: it appears to be the expression in Cartesian coordinates of something like a wave function or a rotation.

it is equation taken from

which is Navier–Stokes equations

its for fluid flow

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1 Answer

Answer by Walter Roberson
on 29 Mar 2013

Use the symbolic toolbox function diff()


8 is correct. f = x^3, and 2^3 is 8.

after differentation we get 3x^2,so the answer should be 12 rite

No, the answer for a=subs(f,[x],2) should be 8. Calculating diff(f) makes no difference to the value you find by substituting something into f.

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