[yt-users] Setting Color map and x and y axis ticks in PlotCollection or ProjectionPlot

[k.grisdale at surrey.ac.uk]

Thanks agains

Kearn
On 6 Nov 2013, at 14:24, Britton Smith <brittonsmith at gmail.com<mailto:brittonsmith at gmail.com>> wrote:

Hi Kearn,

You can use the set_zlim command (prj.set_zlim(field, min, max)) to adjust the scale, but I don't think there is any simply way of fixing the values for colors in the middle of the colorbar.

Britton


On Wed, Nov 6, 2013 at 2:15 PM, <k.grisdale at surrey.ac.uk<mailto:k.grisdale at surrey.ac.uk>> wrote:
Hi Britton,

Thank you for you help. That makes it very simple.

One follow on question: Is there a command that allows me to set the range for the colours so for exam that green 1g/cm^3 and red is 5g/cm^3?

Thanks again

Kearn

On 6 Nov 2013, at 14:02, Britton Smith <brittonsmith at gmail.com<mailto:brittonsmith at gmail.com>> wrote:

Hi Kearn,

You can solve this with your first approach by doing:
prj.set_cmap('Density', ‘YlOrRd’)

The reason for this is that ProjectionPlot allows you to project more than one field at a time and so this functionality lets you set the colormap for each projection individually.

We are currently in the process of phasing out the PlotCollection, so I would discourage you from using the second approach.

Britton


On Wed, Nov 6, 2013 at 12:32 PM, <k.grisdale at surrey.ac.uk<mailto:k.grisdale at surrey.ac.uk>> wrote:
Hi Everyone,

I am trying to plot 3D data from RAMSES as a projection. The plots I have created with the ProjectionPlot look good (with the command below) but I want to rescale the colour map so that when I compare different times the scale matches. I would also like to change colour map used.

[ProjectionPlot(p6,'z','Density',center=[0.5,0.5,0.5]).save(“p6”)]

I started by trying to change just the colour map on these plots using the following:

prj=ProjectionPlot(p6,'z','Density',center=[0.5,0.5,0.5]).save(“p6”)
prj.set_cmap(‘YlOrRd’)

but I get the error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Applications/Code/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.py", line 107, in newfunc
    rv = f(*args, **kwargs)

and I’m not sure what I am missing.

I have now tried a different approach of

cen = [0.5,0.5,0.5]
pc = PlotCollection(p6, cen)
pc.add_projection("Density",2)
pc.set_width(0.5, 'cm')
pc.set_xlim(-0.35, 0.35)
pc.set_ylim(-0.35, 0.35)
pc.set_zlim(0.06, 0.22)
pc.set_cmap('YlOrRd')
pc.save('test’)

While this new approach changes the colour map on the image it does update the colour map on the colour bar(not sure if thats the correct name) on the left of the image.The scale however does update. Also this method produces graphs with out ticks for x and y axis which I would like have.

Can anyone point out what I am missing or what I can do differently?

Thanks In advance

Kearn



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