"Matlab-like" plotting library

Issue 1521: contour doesnot work

Reported by Tianzhu Qiao, Jan 5, 2015

Steps to reproduce the problem:
1. install 0.46
2. run the contour demo from scilab help
   t=linspace(-%pi,%pi,30);
   function z=my_surface(x, y),z=x*sin(x)^2*cos(y),endfunction
   contour(t,t,my_surface,10)

Expected result: 
show the contour figure

Actual result:
contour(t,t,my_surface,10)
 !--error 202 
unglue: Wrong type for input argument #1: Handle matrix expected.
at line     160 of function contour2d called by :  
at line      93 of function contour called by :  
contour(t,t,my_surface,10)

I think the problem is gca()/gcf()(since it is different from the 
default scilab ones). If I change the gca & gcf to _gca & 
_gcf. The above code runs fine. Thanks! 

Best Regards
Tianzhu Qiao

Comment 1 by Alberto Monetti, Sep 14, 2015

Dear Tianzhu

I have the same problem of you. What do you mean with "change 
the gca & gcf to _gca & _gcf"?

Alberto

Comment 2 by Tianzhu Qiao, Sep 23, 2015

Dear Alberto,

I think the problem is that plotlib overwrites the default 
gca()/gcf() functions, and returns different handlers than the 
original functions. Thus, contour gets confused. 

I rename the gca()/gcf() in plotlib to _gca()/_gcf(), and rebuild 
the plotlib (update buildmacros.sce accordingly). It seems that it 
works fine now.

Best Regards,
Tianzhu Qiao

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Created: 3 years 9 months ago by Tianzhu Qiao

Updated: 2 months 2 days ago

Status: New

Followed by: 10 persons

Labels:
Priority:Medium
Type:Defect