I have similar issues when running your code. However, the same code works
if you do not do implicit plotting:
var('x y')
xrange = (x,0,5)
yrange = (y,0,5)
f1 = plot(x**2,xrange,color='red',legend_label='x^2 - 4x + y^2 == 0')
f2 = plot(x,xrange,legend_label='x*y==1')
result = f1+f2
result.legend(True)
result.show(legend_loc='upper right',frame=True)
To me this implies that the problem is with implicit plotting.
On Thursday, March 6, 2014 11:02:04 AM UTC-8, tvn wrote:
>
> Hi, I try to add legend on a plot (created below) but doesn't seem to have
> any success. There was no error, the legends just won't show up.
>
>
> var('x y')
> xrange = (x,0,5)
> yrange = (y,0,5)
> f1 =
> implicit_plot(x**2-4*x+y**2==0,xrange,yrange,color='red',linewidth=5,legend_label='x^2
>
> - 4x + y^2 == 0')
> f2 = implicit_plot(x*y==1,xrange,yrange,linewidth=5,legend_label='x*y==1')
> result = f1+f2
> result.legend(True)
> result.show(legend_loc='upper right',frame=True)
>
>
>
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