Hi Dave,
It's a bit tricky to figure this out precisely, but I just made a
script that tested something similar on the IsolatedGalaxy dataset.
http://i.imgur.com/CE4lI.png
http://paste.yt-project.org/show/3050/
The image I made looks fine to me, but yours does look a bit strange.
There are a few things I would ask:
1) How did you set xmin, xmax, ymin, ymax?
2) What are the field definitions of CellVolumeNorm and
Lambda_therm_neg? By any chance, does Lambda_therm_neg have a ton of
zero values in it?
3) Can you try again with a colormap that doesn't have white at the bottom?
-Matt
On Fri, Jan 11, 2013 at 12:52 PM, david collins
Hi, all--
We're trying to overplot a phase diagram and profile, and we're seeing a strange mis-alignment of the data. I've attached the plot, and the arguments used to create it are as follows:
phase_therm_neg = \ pc.add_phase_object(dd, ["Pressure", "Lambda_therm_neg", "CellVolumeNorm"], weight=None, x_bins=xnbins, y_bins=ynbins, \ x_bounds=[xmin,xmax], y_bounds=[ymin,ymax], cmap = "PuBuGn") profile_therm_neg = pc.add_profile_object(dd, ["Pressure", "Lambda_therm_neg"], weight='CellVolumeNorm', \
x_bounds=[xmin,xmax], x_bins=xnbins) phase_therm_neg.modify["line"](profile_therm_neg.data["Pressure"], profile_therm_neg.data["Lambda_therm_neg"])
The fact that the line is below the peak of the color in the P=[10,10^4] range could be real, since the peak of the color distribution will trace the median, but the line is the average, though the effect is more pronounced than I would expect. But in 10^4-10^5, there simply aren't any points down there, which leads me to believe I'm doing something funny. Is there any obvious error in this script to anyone else? Or any funny statistical phenomenon that I might be missing?
d.
-- Sent from my computer.
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