Re: [Matplotlib-users] problem with design of matplotlib.pyplot.scatter?

> - I don't follow what the snippet of code below is doing:
> 
>        if cbook.iterable(value):
>            vtype = 'array'
>            val = ma.asarray(value).astype(np.float)
>        else:
>            vtype = 'scalar'
>            val = ma.array([value]).astype(np.float)
> 

The idea is that the norm __call__ method should return a scalar when 
given a scalar input, or an array when given a sequence input.  It is 
easiest to do the calculation with masked arrays or ndarrays, however, 
so inputs are converted, keeping track of whether it is a scalar or not, 
so that if it is a scalar, the output can be converted from 1-element 
array back to a scalar.

Eric