How to use chebop function?

When I try to input

>> a = chebop(-1,1);

the result was:

Undefined function 'chebop' for input arguments of type 'double'.

I'm working on windows 32 bit, and no result when searching for the function "chebop" in help.

I do not understand the problem?

Answer 1

[Bjorn Gustavsson]

Have you installed the chebfun package? Have you added the chebfun install directory to the matlab-path?

If you have it installed but not on the matlab-path try something like this:

chebfunroot = '/home/bjorn/matlab/Local/Numerics/chebfun-master'; % for my case
addpath(chebfunroot)

If it is not installed install the toolbox first...

HTH

[Mohamed Hajjaj]

I have installed chebfun and it works; thank you very much for your answer.

[Bjorn Gustavsson]

My pleasure!

Chebfun is a brilliant toolbox, have fun using it.