[yt-users] Labels on plot

[Matthew Turk]

Hi Shankar, Jean-Claude,

This is a wart in the code.  I think Jeff Oishi is going to take a
whack at fixing it broadly today, but here's a quick hotfix.

Jean-Claude's right, it should be LaTeX-style syntax (with some
caveats.)  The trick is that the field name stays the same, but you
apply a label afterward:

p = pc.add_projection("Dark_Matter_Density",0)
p.set_label("Dark Matter Density")

Note that this will not have the "Dark Matter Density" rendered in a
LaTeX (mathtext is the actual name) font.  To do that, you specify it
inside $'s:

p.set_label(r"$\mathrm{Dark}\/\mathrm{Matter}\/\mathrm{Density}$")

Note here that we have to put our roman text inside "\mathrm{}" calls,
and we have to explicitly escape the spaces with "\/".  Additionally,
we make it a "raw" string, which means all special characters are
unescaped -- that's what the preceding "r" is.

Also, if you are *adding* a field, you can specify a "display_name" (
http://yt.enzotools.org/doc/howto/creating_derived_fields.html#field-options
) that will be used instead.  For many fields, this is in the code,
but evidently Dark_Matter_Density is not specified -- which is why it
tries to render the field name.

Hope that helps!

-Matt

On Tue, Mar 30, 2010 at 8:49 AM, Agarwal, Shankar <sagarwal at ku.edu> wrote:
> Hi,
>
> nope. It gives a syntax error.
>
> Traceback (most recent call last):
>  File "1.py", line 12, in <module>
>    p = pc.add_projection("Dark\_Matter\_Density", 0, source=reg1)
> KeyError: 'Dark\\_Matter\\_Density'
>
> Shankar
>
> -----Original Message-----
> From: yt-users-bounces at lists.spacepope.org on behalf of Jean-Claude Passy
> Sent: Tue 3/30/2010 10:40 AM
> To: Discussion of the yt analysis package
> Subject: Re: [yt-users] Labels on plot
>
> Hi,
>
> try the LaTex syntax:
>
> p = pc.add_projection("Dark\_Matter\_Density", 0, source=reg1)
>
>
> Jean-Claude
>
> Agarwal, Shankar a écrit :
>> Hi,
>>
>> http://drop.io/Dark_Matter_Density
>>
>> In the above plot, the label is Dark_Matter_Density. But the "M" in matter and "D" in Density do not print correctly.
>>
>> How can I correct "M" and "D" ?
>>
>>
>> Here is the script I am using...
>>
>> from yt.mods import *
>>
>> fn = "RedshiftOutput0001"
>> pf = load(fn)
>> reg = pf.h.region([0.5, 0.5, 0.5], [0.45, 0.0, 0.0], [0.55, 1.0, 1.0])
>> pf.h.save_object(reg, "region")
>> reg1 = pf.h.load_object("region")
>>
>> pc = PlotCollection(pf,center=[0.5, 0.5, 0.5])
>> p = pc.add_projection("Dark_Matter_Density", 0, source=reg1)
>> p.set_zlim(1e-8, 5e-3)
>> pc.save("%s" % pf)
>>
>>
>> Shankar
>> _______________________________________________
>> yt-users mailing list
>> yt-users at lists.spacepope.org
>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>