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 -- Jeffrey S. Whitaker Phone : (303)497-6313 NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449 325 Broadway Boulder, CO, USA 80305-3328 ------------------------------------------------------------------------- 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
