Hi all, I have two questions on yt SlicePlot. First, when I make a new field and generate the SlicePlot of the simulation with a given field, I face on following error message: Traceback (most recent call last): File "Pot.py", line 16, in <module> pc = SlicePlot(pf, "x", "PotentialFieldCGS", width = (6.0, 'kpc'),center=den_center) File "/home/jhchoi/common/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/visualization/plot_window.py", line 804, in __init__ PWViewerMPL.__init__(self, slc, bounds, origin=origin) File "/home/jhchoi/common/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/visualization/plot_window.py", line 447, in __init__ if setup: self._setup_plots() File "/home/jhchoi/common/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/visualization/plot_window.py", line 617, in _setup_plots self.plots[f].image, cax = self.plots[f].cax) File "/home/jhchoi/common/lib/python2.7/site-packages/matplotlib/figure.py", line 1104, in colorbar cb = cbar.Colorbar(cax, mappable, **kw) File "/home/jhchoi/common/lib/python2.7/site-packages/matplotlib/colorbar.py", line 731, in __init__ ColorbarBase.__init__(self, ax, **kw) File "/home/jhchoi/common/lib/python2.7/site-packages/matplotlib/colorbar.py", line 246, in __init__ self.draw_all() File "/home/jhchoi/common/lib/python2.7/site-packages/matplotlib/colorbar.py", line 260, in draw_all self._process_values() File "/home/jhchoi/common/lib/python2.7/site-packages/matplotlib/colorbar.py", line 558, in _process_values b = self.norm.inverse(self._uniform_y(self.cmap.N+1)) File "/home/jhchoi/common/lib/python2.7/site-packages/matplotlib/colors.py", line 895, in inverse return vmin * ma.power((vmax/vmin), val) File "/home/jhchoi/common/lib/python2.7/site-packages/numpy/ma/core.py", line 6043, in power m |= invalid ValueError: invalid return array shape I suspect the reason is that Field value is negative and z value tends to be log scale (because I make it positive the yt work). Is there any way to make plot in negative with making linear z-value? Second, when I make a SlicePlot with small region, owing to resolution (certain grid cell size is not 1/10 of the Sire x-y size) the plot looks ugly. Is there any way to visually improve the low resolution SlicePlot? Thank you in advance, Junhwan -- -------------------------------------------------------------- Jun-Hwan Choi, Ph.D. Department of Physics and Astronomy, University of Kentucky Tel: (859) 897-6737 Fax: (859) 323-2846 Email: jhchoi@pa.uky.edu URL: http://www.pa.uky.edu/~jhchoi --------------------------------------------------------------