# 3dplot of modulus of complex function

Even though abs(x+I*y) should always be real... I get the following error:

plot3d(abs(x+I*y),(x,-5,5),(y,-5,5)) ERROR: unable to coerce to a real number

3dplot of modulus of complex function

Even though abs(x+I*y) should always be real... I get the following error:

plot3d(abs(x+I*y),(x,-5,5),(y,-5,5)) ERROR: unable to coerce to a real number

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1

This is may not be a good answer explaining why is the `Symbolic Ring`

not working here, but at least a workaround: forget about symbolic functions and use Python lambda functions instead:

```
sage: plot3d(lambda x,y: abs(x+I*y), (x,-5,5), (y,-5,5))
```

or even:

```
sage: plot3d(lambda x,y: abs(x+I*y), (x,-5,5), (y,-5,5), adaptive=True)
```

Asked: **
2013-09-04 06:55:44 -0500
**

Seen: **100 times**

Last updated: **Sep 04 '13**

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