how can i use slice for symbolic functions?

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Moein
Moein 2014-10-1
评论： Mischa Kim 2014-10-1
hi friends
as you know, for symbolic functions, we can not use formulas like plot, mesh, surf , ... and then we should use formulas like ezplot, ezmesh, ezsurf , ... but about the formula " slice " (for symbolic functions), what formula we sholud use? ezslice?!! (it doesn't exist)

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Mischa Kim
Mischa Kim 2014-10-1
编辑：Mischa Kim 2014-10-1
Moein, most likely you can use matlabFunction to convert the symbolic functions and then use function such as slice.
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Moein
Moein 2014-10-1
编辑：Moein 2014-10-1
Hi Mischa
thanks a lot for your answer. i tried your answer but it errors i know my mistake: my code to draw slice, is incorrect let's solve it by an axample
for an example easier than my code, but like that, assume that i want to create slices for r(x,y,z) and r is symbolic function i use this code:
syms x y z;
r = x^2 + y^2 + z^2;
s = matlabFunction(r);
[x,y,z] = meshgrid(-2:.2:2,-2:.25:2,-2:.16:2);
xslice = [-1.2,.8,2]; yslice = 2; zslice = [-2,0];
slice(x,y,z,s,xslice,yslice,zslice)
colormap hsv
but it errors:
??? Error using ==> slice at 85 V must be a 3-D array.
what should i do? help me if you can
thanks a lot
Mischa Kim
Mischa Kim 2014-10-1
If your function is readily available (as is the case above) you do not need to use the symbolic approach at all. See the answer to your duplicate question.

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