Am 2014-09-09 um 05:03 schrieb Miguel Yorro:
> Hi! I'm using Craig Finch Sage Beginner's Guide to learn to use Sage.
> However, when I ran the following code (both in the notebook and
> terminal mode)
>
> |
> sage:var('x')
> x
> sage:sinc(x)=sin(x)/x
> sage:plot(sinc,(x,-10,10))
Try one of the following:
sage: var('x')
x
sage: sinc(x) = sin(x)/x
sage: sinc
x |--> sin(x)/x
sage: sinc(x)
sin(x)/x
sage: plot(sinc, (-10, 10))
sage: plot(sinc(x), (x, -10, 10))
Both work for me. "sinc" is a function, so if you use it directly as you
did, you don't have to specify a variable in plot. If you want to do
this, use "sinc(x)", which is a symbolic expression.
Daniel
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