1 | initial version |

There are a few options. One is to use the `piecewise`

command:

```
f=Piecewise([[(-10,1),sin(x)],[(1,10),cos(x)]],x)
plot(lambda x: f(x),(-2*pi,2*pi))
```

Another is to use a python function definition:

```
def f(x):
if x<=1:
return(sin(x))
else:
return(cos(x))
plot(f,(-2*pi,2*pi))
```

Note that with the python function definition, the `plot`

command must be called just with `f`

and not `f(x)`

. Calling with `f(x)`

causes python to evaluate $f$ before doing the plot and will result in an incorrect plot.

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