> These two functions working differently due to a slight difference in > their intent. The pltr* functions take index values and translate > them in to plot-world coordinates (ex. (i, j) indexing an element in a > grid -> (x, y) position in plot space). > > plstransform takes a coordinate (ex. a radius and an angle for polar > data) and translates this in to plot world (x, y) coordinates. The > mapform function callback used in plmap or plmeridians works similarly > (see example 19). > > These two (pltr* functions and plstranform) can be used together for > more complicated coordinate transformation purposes. >
It is highly likely that I am approaching the problem from the wrong direction, and perhaps another tack would be more fruitful. What I am attempting to do is represents data sets both in rectangular and polar for, hopefully auto-magically switching between them. A lot of the data I have is related to GPS satellites (value, azimuth, elevation) and I would like to parse it, then plot in rectangular/polar. For example the value might be SNR, which can be averaged into bins and then plotted with 'plimagefr' and the like. Being able to also use 'pltransform' to auto-magically map azi/ele points/lines onto the same plot would be a 'big win'; for example to plot positions of the individual satellites at an instant in time. > plstransform is a new addition to PLplot. Suggestions for > improvements to its documentation [1] are quite welcome, particularly > if its use and purpose are unclear. > I'll have a look in the source to see if that helps my understanding.... Thanks, Simon. ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Plplot-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/plplot-general
