[Numpy-discussion] histogram help

Samuel John scipy@samueljohn...
Mon Jan 30 16:06:22 CST 2012


Hi Ruby,

I still do not fully understand your question but what I do in such cases is to construct a very simple array and test the functions.
The help of numpy.histogram2d or numpy.histogramdd (for more than two dims) might help here.

So I guess, basically you want to ignore the x,y positions and just look at the combined distribution of the Z values?
In this case, you would just need the numpy.histogram (the 1d version).

Note that the histogram returns the numbers and the bin-borders.

bests
 Samuel


On 30.01.2012, at 20:27, Ruby Stevenson wrote:

> Sorry, I realize I didn't describe the problem completely clear or correct.
> 
> the (x,y) in this case is just many co-ordinates, and  each coordinate
> has a list of values (Z value) associated with it.  The bins are
> allocated for the Z.
> 
> I hope this clarify things a little. Thanks again.
> 
> Ruby
> 
> 
> 
> 
> On Mon, Jan 30, 2012 at 2:21 PM, Ruby Stevenson <ruby185@gmail.com> wrote:
>> hi, all
>> 
>> I am trying to figure out how to do histogram with numpy
>> 
>> I have a three-dimension array A[x,y,z],  another array (bins) has
>> been allocated along Z dimension, z'
>> 
>> how can I get the histogram of H[ x, y, z' ]?
>> 
>> thanks for your help.
>> 
>> Ruby
> _______________________________________________
> NumPy-Discussion mailing list
> NumPy-Discussion@scipy.org
> http://mail.scipy.org/mailman/listinfo/numpy-discussion



More information about the NumPy-Discussion mailing list