Friedrich Romstedt wrote: > 2010/4/19 Eric Firing <efir...@hawaii.edu>: >> David Ho wrote: >>> Just as an illustration, I'm looking for a nice way to plot something >>> like this: >>> http://labrosa.ee.columbia.edu/matlab/sgram/ >>> >>> I don't necessarily need a weighting matrix to convert the Pxx array, >>> which is what Dan Ellis' code does; I just need to visualize the >>> spectrogram on a logarithmic axis. >>> >>> Is there any built-in way to do this? >> David, >> >> The components exist, but they have not been assembled. One approach >> would be to use the NonUniformImage class in place of image to handle >> the log axis case. A variation would be to use pcolorfast. Evidently >> we need to add a log scale option to the existing specgram. I can't do >> it right now--maybe someone else will. >> >> Eric > > Hello David, > > You asked for a builtin solution, and I think this question has been > answered by Eric, but maybe you want also a more elaborate solution. > > As a workaround, do you think you can do the spectrogram > transformation on your own using the functions matplotlib uses to > generate the data, and use pcolor() to plot it with a logarithmic > mesh?
Use pcolormesh or Axes.pcolorfast--pcolor will take forever. Eric > > Friedrich ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
