>>>>> "Jeff" == Jeff Huang <[EMAIL PROTECTED]> writes:
Jeff> Is it possible to have gradients in the bar graphs made by Jeff> matplotlib? I couldn't find anything about it in the user Jeff> guide. Here is some example code form the mailing list To: Christopher Barker <[EMAIL PROTECTED]> Cc: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] graphs From: John Hunter <[EMAIL PROTECTED]> Date: Tue, 16 May 2006 15:01:15 -0500 >>>>> "Christopher" == Christopher Barker <[EMAIL PROTECTED]> writes: Christopher> That I don't know. The Agg renderer certainly can do Christopher> a nice job with gradients, but I don't know if MPL Christopher> support that. You can emulate gradients using matplotlib images -- either with colormaps or defining your own rgba endpoints for the gradients. Here's an example of an axes background gradient from pylab import figure, show, nx, cm fig = figure() xmin, xmax = xlim = 0,2 ymin, ymax = ylim = -1,1 ax = fig.add_subplot(111, xlim=xlim, ylim=ylim, autoscale_on=False) X = [[.6, .6],[.7,.7]] ax.imshow(X, interpolation='bicubic', cmap=cm.Blues, extent=(xmin, xmax, ymin, ymax), alpha=1) t = nx.arange(xmin, xmax,0.01) ax.plot(t, nx.sin(2*nx.pi*t), lw=2, color='black') show() Likewise, you can make your own gradient bars charts: from pylab import figure, show, nx, cm def gbar(ax, x, y, width=0.5, bottom=0): X = [[.6, .6],[.7,.7]] for left,top in zip(x, y): right = left+width ax.imshow(X, interpolation='bicubic', cmap=cm.Blues, extent=(left, right, bottom, top), alpha=1) fig = figure() xmin, xmax = xlim = 0,10 ymin, ymax = ylim = 0,1 ax = fig.add_subplot(111, xlim=xlim, ylim=ylim, autoscale_on=False) X = [[.6, .6],[.7,.7]] ax.imshow(X, interpolation='bicubic', cmap=cm.copper, extent=(xmin, xmax, ymin, ymax), alpha=1) N = 10 x = nx.arange(N)+0.25 y = nx.mlab.rand(N) gbar(ax, x, y, width=0.7) ax.set_aspect('normal') show() Viewer discretion is advised. If you want to get clever, you can define patterns and fills this way too. We should add an interface to expose this functionality more readily... JDH ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users