detrend_linear bug

We removed the typecode= kwargs when porting matplotlib to be
compatible with Numeric and numarray. It's my understanding that the
kwarg version works with all (reasonable recent) versions of Numeric
but only very recent versions of numarray. What version of
Numeric/numarray are you using?

I'm using the Enthought distribution 2.3.3 which is supposed to come with Numeric 23.1 but seems to provide Numeric 23.3 indeed!

JM. Philippe