Python Warning, possibly Numpy
As I run my code I get these warnings, allways in groups of four, sporadicly. I have tried to locate the source by placing debug messages before and after sertain statements to pin-point its origin.

    Warning: invalid value encountered in double_scalars
    Warning: invalid value encountered in double_scalars
    Warning: invalid value encountered in double_scalars
    Warning: invalid value encountered in double_scalars

Is this is a Numpy warning and what is a double scalar?

From Numpy I use

    min(), argmin(), mean() and random.randn()

I also use Matplotlib
Python Warning, possibly Numpy
===

As I run my code I get these warnings, allways in groups of four, sporadicly. I have tried to locate the source by placing debug messages before and after sertain statements to pin-point its origin.

    Warning: invalid value encountered in double_scalars
    Warning: invalid value encountered in double_scalars
    Warning: invalid value encountered in double_scalars
    Warning: invalid value encountered in double_scalars

Is this is a Numpy warning and what is a double scalar?

From Numpy I use

    min(), argmin(), mean() and random.randn()

I also use Matplotlib