Re: [Matplotlib-users] Problem with plotting fast spiking data

[Eric F. <ef...@ha...>]

Jakub Nowacki wrote:
> Hi,
> 
> I work with neural models and I have problem with plotting fast spiking data. The spikes on the plot appear to have different hight which changes when I for example resize the plot window. The same problem is with saving data into files, especially in vector formats. I found the information about changing the join style, it helps a bit (rounded is the best) but doesn't solve the problem. For raster formats the workaround is to save the data in higher resolution, using DPI option. Below I included links to examples.
> 

This sounds like a problem with the path simplification algorithm.  If 
so, the question is whether it is a bug that has been fixed or a new 
bug.  What mpl version are you using?  Can you build and install from svn?

Eric

> Normal example (100 DPI):
> https://docs.google.com/leaf?id=0B3NZY3443E1VY2JjNTc3MjAtZDI5NC00OThjLTgwY2EtNTVhMDVkZWQ2YzIw&hl=en
> 
> Example 300 DPI:
> https://docs.google.com/leaf?id=0B3NZY3443E1VNDdkMzUzNzAtMjdmNC00NjFmLTliMzMtODE5MzExMmNjNjQz&hl=en
> 
> The problem is vector files (I'm especially interested in EPS) ignore DPI option. I've experimented with different backends and the problem is persistent on GUI and 'file-writting' back ends. I also tested it on Linux and Mac, and the outcome does't change. Creating larger figures sometimes helps a bit but not always solve the problem. 
> 
> Just to mention that plotting this kind of data is possible 'out of the box'  in Matlab or XPPAut (which is not the most fancy plotting tool) I get a proper outcome. Maybe there should be a option to plot raw data in some sense, or join style function that deals with such a plots in a proper fashion. 
> 
> If you need some additional information do not hesitate to ask. Thanks for the help in advance. 
> 
> Cheers,
> 
> Jakub