This effect is happening within an web app that displays gridded
fields from multiple datasets (~4500 lines of code). So I it's tricky
to create an example. Although if I use numpy.min(grid) the minimum
is 0. So, I think colorbar or matplotlib is interpreting the 0 as -0.
(Matplotlib version 0.99.0 RC0)
The colorbar call that I'm using is:
cbar = pyplot.colorbar(plot,shrink=0.7, format="%1.1f",
spacing='proportional',orientation='vertical')
cbar.ax.set_ylabel(cbar_label(param,unit))
The function cbar_label is:
def cbar_label(param,unit):
#Helper function for making colorbar label
if param == "sig":
if unit==1:
cbar_label = "Feet"
else:
cbar_label = "Meters"
elif param == "dir":
cbar_label = "Radial Direction"
elif param == "per":
cbar_label = "Seconds"
elif param[-5:] == "_wind":
if unit == 3:
cbar_label = "Kts"
else:
cbar_label = "M/S"
elif param[-4:] == "_hgt":
if unit == 5:
cbar_label = "GPFt"
else:
cbar_label = "GPM"
elif param == "slp":
cbar_label = "Millibars"
elif param == "1000_rh":
cbar_label = "%"
elif param == "1000_temp":
if unit == 9:
cbar_label = "Degrees F"
else:
cbar_label = "Degrees C"
else:
cbar_label = param
return cbar_label
If this doesn't offer anything, I'll try to generate a
compartmentalized example of the issue.
Bruce
---------------------------------------
Bruce W. Ford
Clear Science, Inc.
br...@clearscienceinc.com
http://www.ClearScienceInc.com
http://www.facebook.com/clearscience
http://www.twitter.com/ROVs_rule
Phone: (904) 796-8101
Fax: (904) 379-9704
8241 Parkridge Circle N.
Jacksonville, FL 32211
Skype: bruce.w.ford
---------------------------------------
To schedule a meeting with Bruce, Go to: http://tungle.me/bruceford
----------------------------------------
On Fri, Aug 20, 2010 at 2:06 PM, Eric Firing <efir...@hawaii.edu> wrote:
> On 08/20/2010 05:29 AM, Bruce Ford wrote:
>> I have a grid with values ranging from exactly 0.0 and 100.0. When I
>> plot this with colorbar, the base of the colorbar is labeled "-0.0".
>> Is this a default for 0.0...to plot it with as a negative number? Any
>> workarounds?
>
> Would you provide a minimal runnable example, please, and specify what
> mpl version you are using? It is certainly not intended or usual that 0
> be displayed as -0.
>
> Eric
>
>
>>
>> Bruce
>>
>> ---------------------------------------
>> Bruce W. Ford
>> Clear Science, Inc.
>
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