Indeed, my question is related to pedagogical reasons. Even if my code is
simple, it uses the import machinery that I would like to not use.
Le 27 nov. 2014 22:31, "Nils Bruin" <nbr...@sfu.ca> a écrit :
> 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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