Eric Firing wrote:
> John Hunter wrote:
>> On Wed, Apr 2, 2008 at 6:39 PM, Erik Tollerud <[EMAIL PROTECTED]> wrote:
>>
>>>  are slightly different).  There's a slight compatibility issue in that
>>>  as it stands in that the returned tuple now has 4 values (I added a
>>>  list of the lines that are generated if the steps command is used),
>>>  but I can't really imagine how that could break anything but the
>>>  poorest-written code...
>> I'm not sure I understand this: won't it break all code written like:
>>
>>   n, bins, patches = ax.hist(x, 50, normed=1)
>>
>> which is the code presented in the histogram example and a fairly
>> common approach.  I don't see this as an example of the "poorest
>> written code".    I am inclined to not break this call signature
>> unless the lines are actually used, ie 'step' in histtype.  On a quick
>> read of the code, you either get lines or patches but not both, so how
>> about
>>
>>     n, bins, patches = ax.hist(x, 50, normed=1)
>>
>> or
>>
>>    n, bins, lines = ax.hist(x, 50, normed=1, histtype='lines')
> 
> That was my first reaction also, but the proposed "stepfill" option 
> yields a bunch of bar patches *and* a line.  The solution may be to 
> accomplish "stepfill" with two separate calls, or to have 4 outputs only 
> in the "stepfill" case.  Or, with sufficient rewriting I think the 
> "stepfill" case could yield a single patch and a single line, and the 
> third output in this case could be a single corresponding 2-element 
> tuple or list.  That is, the third output is considered simply a list of 
> artists.  Now I will stop speculating and leave it to Manuel to sort out.
> 
> Eric

I have just committed a patch to add the histogram step functionality. I 
  took Erik Tollerud's patch as basis, but basically re-wrote it 
completely in the end ...

   The advantages are: (i) considerably smaller code and (ii) return 
values are unchanged, ie.

   n, bins, patches = ax.hist(x, 50)
   n, bins, patches = ax.hist(x, 50, histtype='step')

In contrast to the original patch, histtype='step' is filled and to 
produce a non-filled histogram, one has to use facecolor='None'.

Hope I haven't overlooked anything or broken other code ;-)

Manuel

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