Thanks! I had originally just tried it (ignoring the docs) but my plot just showed dots instead of markers for both 'x' and '+'. Then I read the docs which seemed to indicate they wouldn't work.
Late last night I was digging through axes.py and noticed that they should be supported (and I found the scatter example that uses them). My problem was that the point scale input needed to be 3-4 times larger than the default value for the marker to be visible. Once I changed that, everything worked fine. Thanks for the doc patch - that will help everyone else in the future... Ted > -----Original Message----- > From: Manuel Metz [mailto:[EMAIL PROTECTED] > Sent: Thursday, March 20, 2008 1:13 AM > To: Ted Drain > Cc: matplotlib-users@lists.sourceforge.net > Subject: Re: [Matplotlib-users] Efficient scatter() w/ markers from > plot()? > > Ted Drain wrote: > > I need to efficiently plot a set of x,y points where each point has a > > different color. I tried multiple calls to plot() with a single > point each > > but that is way too slow. I switched to using scatter() and passing > in a > > list of colors which works great. However, I'd really like to have > the > > marker options from plot() (things like '+' and 'x') which don't work > w/ > > scatter. > > > > What's the easiest way to get the markers from plot() with the > efficiency > > (and multi-colors) from scatter? > > > > Thanks, > > Ted > > > > Hi Ted, > oh - you can use '+' and 'x' and many more markers with scatter. It's > unfortunately just not documented in the current release but is fixed > in > the repository. > > pylab.scatter(x,y, marker=(4,2)) > > gives a '+', and > > pylab.scatter(x,y, marker=(4,2,math.pi/4.)) > > gives a 'x'. The logic is a follows: > > marker(numside, type, angle) > > numside is the number of edges, i.e. 4 for a plus or a cross. > > type : 0 -> a filled symbol, > 1 -> a star-like symbol, > 2 -> a asterisk like symbol > > angle: the symbol gets rotated by this angle > > So in principle with this you can produce an endless number of > different > markers... :-) > > Manuel > > -- > --------------------------------------- > Manuel Metz ............ [EMAIL PROTECTED] > Argelander Institut fuer Astronomie > Auf dem Huegel 71 (room 3.06) > D - 53121 Bonn > > E-Mail: [EMAIL PROTECTED] > Web: www.astro.uni-bonn.de/~mmetz > Phone: (+49) 228 / 73-3660 > Fax: (+49) 228 / 73-3672 > --------------------------------------- ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
