Re: 2.9.10, finally?

[Daniel J Sebald]

Søren Hauberg wrote:
> John W. Eaton skrev:
>
> >   + With gnuplot 4.2, image data is plotted with gnuplot and may be
> >     combined with other 2-d plot data.
>
> Does this actually work? With a recent CVS checkout I get the following 
> behaviour:
>
>   * "imshow(rand(100))" shows a color image, while it should be a 
> gray-scale image (rand(100) is 2D and hence gray-scale).


    Display the image IM, where IM can a 2-dimensional (gray-scale
    image) or a 3-dimensional (RGB image) matrix. If three matrices of
    the same size are given as arguments, they will be concatenated
    into a 3-dimensional (RGB image) matrix.

In a hurry to document, someone may have typed "gray-scale" when really what was meant is 
gradient or "according to colormap".

However, there may be a bug somewhere.  I'd think that

colormap(gray(64));
imshow(rand(100));

would be gray-scale, but that too has a color gradient.

>   * "I(:,:,3) = rand(100); imshow(I)" shows a horizontal gradient image 
> where the left-most color is black, going through, purple to red, ending 
> in the right-most color being yellow. The shown image should have been a 
>  blue image containing random values.

Definitely a bug there.

Dan