[SciPy-user] what type of data for scipy.stats.mannwhitneyu ?

Robert Kern robert.kern at gmail.com
Tue Nov 29 14:18:01 CST 2005

Eric Emsellem wrote:
> Hi,
> I am trying to compare two datasets with scipy.stats.mannwhitneyu(x,y).
> HOwever I cannot make it work. It always gives me:
> TypeError: data type not understood
> or
> TypeError: Not a numeric type

You should always post at least the part of the traceback that shows the
line that's throwing the exception. In this case:

  x,y = asarray(x, y)

I don't understand why anyone ever thought that would work, but it's
fixed now in SVN. x and y should both be rank-1 arrays, possibly of
different lengths.

Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter

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