Pablo Romero wrote: > Hello, > I have a question about plotting pressure contours with matplotlib. > > I've seen other applications using matplotlib where the pressure contours are > drawn with annoted text "H" and "L" characters being drawn in the centers of > closed contours... > > i.e., if there is a closed contour line, and its value is over a certain > threshold value, plot an "H" to indicate a "high pressure zone", else plot a > "L" to indicate a "low pressure zone." > > This is standard weather map plotting stuff, and Ive definitely seen other > plots produced using matplotlib that inlude these annoted "H" and "L" > characters. In the application Ive seen, the process was most definitely > automated, since it was applied to a large number of plots (i.e., the "H"'s > and "L"'s werent added manually, since its not feasible). Unfortunately, the > creators of these plots are not willing to share their technique. > > I dont know how to set this up with matplotlib. > Does anyone have any experience with this??? > Is there any way to identify a "closed contour" & its value from a "contour > class" that is returned from matplotlib's contour() function??? > Pablo: There is no easy way to do this in matplotlib. I guess you would try to find closed contours with no other contours inside them, the place the label at the center of that region. This might end up being quite tricky. I see from your example that there are many such regions that are not labelled (some are, some aren't).
Or, you might just try to find local minima and maxima in your gridded data and plot H's and L's there. This ought to be easier. -Jeff ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
