Plotting chebmatrices about chebfun

[rothos]

This is because your code concatenates the chebfuns column-wise rather than row-wise, resulting in a single chebfun with a breakpoint in the middle. Changing the semicolon to a comma yields a quasimatrix, which I think is what you want.

x = chebfun('x');
xx = [x, 2*x];
plot(xx, '.-')

[nickhale]

@asgeirbirkis 's approach returns a chebmatrix, but it is still plotable.

In any case, I can't reproduce the problem. I get a blue and green line with
>> plot([x ; 2*x], '-')

However, I get only blue dots with
>> plot([x ; 2*x], '.-')

[rothos]

Does join render this issue obsolete?

[nickhale]

It seems that there's no longer any support at all for plotting chebmatrices?

>> x = chebfun('x');
>> plot([x ; 2*x], '-')
Error using plot
Conversion to double from chebmatrix is not possible. 

[rothos]

Oh, seems you're right. There is no plot method for chebmatrices.

[rothos]

How should plot work for chebmatrices? Should it be a spy plot, like in linop — perhaps with the special case that if everything is a chebfun then plot like a quasimatrix?

[asgeirbirkis]

To plot a chebmatrix only consisting of chebfuns, one can do
plot(chebfun(chebmatrix)). We probably want a spy-like plot for the more
general case.

-A
On 23 Apr 2014 14:07, "Hrothgar" [email protected] wrote:

How should plot work for chebmatrices? Should it be a spy plot, like in
linop — perhaps with the special case that if everything is a chebfun then
plot like a quasimatrix?

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/54#issuecomment-41152981
.

[Hadrien-Montanelli]

Should we close this?

[nickhale]

It can be closed once #478 is merged.