Simson Garfinkel wrote: > Thanks, Eric. Any idea for a work-around on the bar graphs?
There appear to be three problems, each with a workaround or solution: 1) You need to set the log scale *before* calling bar. The bar method checks for log scaling, and if found, it sets the bottom of the bars to a positive value (1e-100) instead of to zero. If you set the log scale *after* calling bar, the zero bottom value gets masked out as invalid. 2) The unit support for datetime objects doesn't quite know what to do with the bar width parameter; it tries to convert it, and I haven't tried to track down exactly what it ends up with. What I have found is that if you use a value of width=20 as a kwarg in bar, you will get close enough that you can make more adjustments to taste. This is an ugly hack. 3) The datetime objects want full years, e.g. 1990, not just the last two digits. I haven't tried to figure out why, but the x-limits don't get calculated sensibly if you use 90 instead of 1990. It presumably has to do with the ticker that is invoked for datetime. So I think you need to either make your own modification of the ticker (or formatter), or use all 4 year digits. > > As far as the Mac goes, I'm happy to get you a log-in on one, if you want. Thanks, but I really don't want to try to delve into the brand-new mac native backend. Eric > > -Simson > > On Jan 8, 2009, at 2:31 PM, Eric Firing wrote: > >> Simson Garfinkel wrote: >>> Hi! >>> Below is a sample program. It demonstrates two bugs when plotting >>> date/ time histograms. >>> 1. When the y scale is made "log", the histogram points plot as >>> lines, but when the y scale is not log, they histogram plots as >>> bars. I do not think that the look of the bars should change >>> depending on whether or not the Y scale is logarithmic. >> >> Simson, >> >> I verified the strange behavior with log and/or date, but looking at >> the code did not yield any understanding of what the problems are. I >> hope someone who has worked on the bar code recently will sort this >> one out. Definitely, there is at least one major bug that needs to be >> fixed. >> >>> 2. When the "agg.pdf" is removed, specifying "log" for the yscale >>> produces a TypeError on the mac (see below) >> >> This is mac-specific, and I don't have a mac, so I can't help with >> this, either. > ------------------------------------------------------------------------------ Check out the new SourceForge.net Marketplace. It is the best place to buy or sell services for just about anything Open Source. http://p.sf.net/sfu/Xq1LFB _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
