Jeff Whitaker wrote: > Ryan May wrote: >> (Sorry if this is a duplicate) >> >> Hi, >> >> I'm trying to make a Skew-T LogP plot, an important plot in >> meteorology, using matplotlib (mainly to help convert people away from >> much more horrible solutions). You can see one here: >> http://www.rap.ucar.edu/weather/upper/oun.gif >> >> and more cartoonish: >> http://www.srh.noaa.gov/oun/images/figure6.gif >> >> >> (Pay attention only to the lower part with the bold red and green >> lines). I'm pretty sure matplotlib can't currently do this, but it >> shouldn't be too hard. The crux of the plot is that you plot >> temperature as a function of pressure, with pressure reversed and >> logarithmically spaced on the Y-axis (ie. high pressure at the bottom) >> and temperature plotted skewed along the X axis. That is, the lines >> of constant temperature intersect the bottom at 45 degree angles. I >> know matplotlib can do log axes, so how hard would it be for me to >> create a transform that can handle the 45 degree skew of the temperature? >> >> Thanks, >> >> Ryan >> >> > Ryan: I'm sure you could do it, and it would be a nice contribution to > the community. There's some IDL code here > > http://cimss.ssec.wisc.edu/camex3/archive/quicklooks/ > > you could work from. There's also NCL code (couldn't find it on the > web, but the source code comes with NCL). I'd suggest working from > those. I don't think you need transforms (although they might make it > easier), since neither of those languages has them. > HTH, > > -Jeff > (Sending to the list this time. Oops)
Thanks. I also managed to find a matlab implementation, which was straightforward to port over. I'm working on fleshing out the full Skew-T look right now. As far as using the transforms, here's the question: Does anyone besides the meteorologists have a need for a plot with a skewed axis? If so, it might pay to make this general. Otherwise, this could stay as a specific Skew-T LogP plot. If the latter is the case, does it make sense to include such a method anywhere in Matplotlib? I guess if nothing else it could go in as an example. Opinions? Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
