On Thursday, November 27, 2014 1:08:30 PM UTC-8, projetmbc wrote:
>
> Hello.
>
> Is it possible to do the same thing as the following code in "pure" Sage
> coding ?
>
> *Christophe BAL*
> *Enseignant de mathématiques en Lycée*
> *et développeur Python amateur*
>
> *--**------**------**--- **CODE **---**------**------**--*
> *import matplotlib.pyplot as plt*
> *import numpy as np*
> *from sympy import binomial*
>
> *nmax = 200*
>
> *im = np.zeros((nmax+1, nmax+1, 3))*
>
> *for n in range(nmax):*
> * for k in range(n+1):*
> * if binomial(n, k) % 2 == 1:*
> * im[k, n] = (255, 255, 255)*
>
> *im = im.astype(np.uint8)*
>
> *plt.imshow(im)*
> *plt.axis('off')*
> *plt.show()*
>
All these components are part of sage. Hence, if you do:
sage: preparser(False) #this may not be necessary, but it guarantees your
code isn't subtly differently interpreted
<paste in your code>
it'll work.
The matplotlib in sage is normally not compiled to support its "show"
method (wxPython is missing from sage's python), but you can use
plt.savefig("fig.pdf") to save the image you just produced, which you can
then view with any pdf viewer.
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