3d plot syntax issue

calc314
4191 ●22 ●48 ●113

I try this in Sage 5.11 Notebook:

var (x' y') 
plot3d(x^2 y^2,(x,-2,2),(y-3,3))

But I got syntax error. I typed the figures correctly, but I don't know how to solve the syntax error.

Comments

Be careful, it should be

 var('x y')

and not

var(x' y')

vdelecroix ( 2015-03-16 22:22:15 +0100 )edit

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calc314
4191 ●22 ●48 ●113

The issue is with x^2 y^2. You need to tell sage the operation between $x^2$ and $y^2$. Is your function $x^2\cdot y^2$? If so, you need:

plot3d(x^2*y^2,(x,-2,2),(y,-2,2)).

As a note, it ispossible to use this syntax with implicit multiplication - see e.g. http://math.stackexchange.com/a/11866...

kcrisman ( 2015-03-16 20:02:22 +0100 )edit

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Asked: 2015-03-16 19:41:08 +0100

Seen: 542 times

Last updated: Mar 16 '15