Manuel Metz wrote: > May I ask again: Is there any interest in a step-plotting function? Yes, so thanks for taking the initiative and for being persistent. > > If so, who will commit the patch? Do I have to add more myself > (documentation for sure needs to be added, what else ?) Please add a docstring and a simple demo suitable for the examples subdirectory. I will commit the patch, or some modification of it. > > Manuel > > Manuel Metz wrote: >> Hi, >> okay, I have added a keyword 'where' as suggested. I also now changed >> the way the incoming data is converted. I took this from the axes.pie() >> function. I don't know much about the unit types yet :-( >> >> Concerning masked arrays: Do I have to consider something special there? I think that if you change the npy.asarray to npyma.array, and similarly for the zeros(), that will provide basic masked array support. Please look at masked_demo.py for an example of the use of masked arrays. (It is very artificial, of course. A typical use case for masked arrays is when you have a data stream with some bad points that you want to edit out, but you want to keep the array dimensions unchanged. In the case of a line plot or step plot, you want the line to break at the missing point to show that a point has been removed.)
Eric >> >> Manuel >> >> Ted Drain wrote: >>> At 10:36 AM 8/14/2007, Eric Firing wrote: >>>> Ted Drain wrote: >>>>> Manuel, >>>>> We do plots like this all the time. One thing we've found that's >>>>> nice to have is a keyword that controls when the increase in y >>>>> happens. We use a step style keyword that can be 'pre' (go up then >>>>> right), 'post' (go right then up), and 'mid' (right 0.5, up, right >>>>> 0.5). >>>> Good idea. >>>>> Regarding your patch, you might want to check other areas in MPL for >>>>> data processing examples. I could be wrong but I'm not sure you can >>>>> assume that incoming data is a float. Some of the unit conversion >>>>> examples or the line collection code might have better examples. >>>> Incoming data can be any numeric type, but it ends up getting >>>> converted to the default float type (not float32) internally. >>>> >>>> Whenever possible, it is good to support masked array input. >>> Agreed - but the way the patch was written, I don't think it will >>> support anything but float (especially not the unit types). >>> >>>> Eric >>>>> Ted >>>>> At 07:59 AM 8/14/2007, Manuel Metz wrote: >>>>>> Hi, >>>>>> >>>>>> I have created a patch against latest svn that adds a function step >>>>>> to the axes class to plot step-functions ;-) It's really simple but >>>>>> nice ... Any interest in adding this? >>>>>> >>>>>> Manuel >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> Index: axes.py >>>>>> =================================================================== >>>>>> --- axes.py (revision 3709) >>>>>> +++ axes.py (working copy) >>>>>> @@ -4995,6 +4995,18 @@ >>>>>> steps=[1, 2, 5, 10], >>>>>> integer=True)) >>>>>> return im >>>>>> + >>>>>> + def step(self, x, y, *args, **kwargs): >>>>>> + x2 = npy.zeros((2*len(x)), npy.float32) >>>>>> + y2 = npy.zeros((2*len(x)), npy.float32) >>>>>> + >>>>>> + x2[0::2] = x >>>>>> + x2[1::2] = x >>>>>> + >>>>>> + y2[1::2] = y >>>>>> + y2[2::2] = y[:-1] >>>>>> + >>>>>> + self.plot(x2, y2, *args, **kwargs) >>>>>> >>>>>> class SubplotBase: >>>>>> """ >>>>>> >>>>>> ------------------------------------------------------------------------- >>>>>> >>>>>> >>>>>> This SF.net email is sponsored by: Splunk Inc. >>>>>> Still grepping through log files to find problems? 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