[Scilab-users] Put an image as the background of an axis

[Samuel Gougeon]

Hello,

Without images, this post should pass the moderation ;)[to the 
moderator: did you decrease the max size of body recently? It was 
formerly possible to post with images and body> 100kB]

Le 08/02/2016 11:47, antoine.monmayrant at laas.fr a écrit :
> Hi everyone,
>
> I just failed at placing an image behind a plot.
> I thought that would be easy:
>     - create a figure
>     - create an image uicontrol
>     - create an axis
>     - plot in the axis
>     - set axis.filled="off"
>
> Apparently I was wrong.
> I did not find a way to overlap a plot with transparent background 
> over my image.
> It seems that the image is always above the plot no matter what order 
> the uicontrol/axes where created.
> I also tried to put both of them inside the same frame, but I did not 
> work either.

You may use the z coordinate of your flat curves to manage overlays, as in:

clf
x  =  linspace(0,20,200);
plot(x,sin(x))
e  =  gce();
c  =  e.children;
// Example with a local image. The image is from 
https://atoms.scilab.org/atoms.png
//xstring(0,-1,"$\scalebox{1}{\includegraphics{atoms.png}}$")
// Example with a remote image under http:// (http*s*: not accepted)
xstring(0,-1,"$\scalebox{1}{\includegraphics{http://www.cnrs.fr/fr/z-tools/newune/themes/CNRSTheme/images/logocnrs.png}}$")
c.data(:,3)  =  0.1;  // <<<==== HERE
c.thickness  =  2;You may then tune the scalebox factor. Actually, like with an 
uicontrol(style="image"), the imported image is inlaid and is not 
resized accordingly with the embedding graphical figure. HTH Samuel Gougeon

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