[yt-users] Problem with multi plot

Tue Aug 6 14:45:55 PDT 2013

Hi Reju,

It looks like your for loops are in the wrong order (as you correctly
surmised).  Your first "for" loop (i.e. for kk in L:) goes through each
redshift output, and it generates a new 3x3 plot collection for each one
which it populates with the slice plots for that redshift.

What I think you want to do is run the two later for loops (i.e. for i in
range (0,3): for j in range (0, 3):) first, and then load in the individual
redshift outputs to populate the plot collection.  Unfortunately, and
someone can correct me here if I'm wrong, but I don't think you'll be able
to use the Plot Collection data structure to do this.  PlotCollections are
necessarily tied to a single data output, not several as you're trying to
do here with the data outputs for each redshift.

What you'll likely have to do instead is just generate an array of slices,
where you generate each from a different data output.  There is some
examples of this on the yt docs page here:

http://yt-project.org/doc/cookbook/complex_plots.html#multi-plot-slice-and-projections

and here:

http://yt-project.org/doc/cookbook/complex_plots.html#advanced-multi-plot-multi-panel

In addition, I wrote up a quick basic script to generate a 3x3 image array
with slices (or projections) from a bunch of different data outputs.  I
think it is what you're trying to do.  It's here:

http://paste.yt-project.org/show/3749/

and it generates this image:

http://i.imgur.com/lhUrcbI.png

I hope this helps.  Let us know if you have any other questions regarding
this.

Cameron

On Tue, Aug 6, 2013 at 10:09 AM, Reju Sam John <rejusamjohn at gmail.com>wrote:

> Dear all,
>
> I am trying to create a muti plot of density's at  different red-shift
> with the following code.
>
> from yt.mods import *
> import matplotlib.colorbar as cb
>
> fig, axes, colorbars = get_multi_plot( 3, 3, colorbar='vertical', bw = 3)
> file1="/app/run/csarkar/surajit/simulation_shock/simulation5/RD00"
> file2="/RedshiftOutput00"
>
> L = [11,15,18,20,22,25,30,35,40]
>
> #for i in range (0, 8):
> for kk in L:
>     fn_i=str(kk)
>     fn=file1+fn_i+file2+fn_i
>     print fn
>     pf = load(fn)
>     pc = PlotCollection(pf, center=[0.5, 0.5, 0.5])
>     for i in range (0,3):
>         for j in range (0, 3):
>             p = pc.add_slice("Density", 2, axes = axes[i][j],figure = fig,
> use_colorbar=False)
>             p.set_log_field(True)
>             p.set_zlim(1e-31,5e-26)
>             p.set_cmap("jet")
>             p.modify["contour"]("Density", ncont=10, plot_args =
> {'colors':'w'},clim=(2e-28,2e-26))
>             p.modify["contour"]("Temperature", ncont=10, plot_args =
> {'colors':'k'},clim=(3e7,1e8))
>             #pc.set_width(3.0, 'mpc')
>             #break
>             # i = i+1
>
>
> for p, cax in zip(pc.plots, colorbars):
>     cbar = cb.Colorbar(cax, p.image, orientation='vertical')
>     p.colorbar = cbar
>     p._autoset_label()
> fig.savefig("multi_plot_3_3" % pf)
>
>
> But I am getting a wrong result. It is printing same figure in all panels.
>
> I think my logic(algorithm)  is wrong. We have to reverse first two for
> loop. But that also making problem.  Please help me.
>
> And also if I include the following line in the code. (in my code I
> commented it out)
>
> pc.set_width(3.0, 'mpc')
>
> it is showing following error.
>
> *Traceback (most recent call last):*
> *  File "multi_plot_loop.py", line 24, in <module>*
> *    pc.set_width(3.0, 'mpc') *
> *  File
> "/data1/pdf/csurajit/yt-x86_64/src/yt-hg/yt/visualization/plot_collection.py",
> line 292, in set_width*
> *    plot.set_width(width, unit)*
> *  File
> "/data1/pdf/csurajit/yt-x86_64/src/yt-hg/yt/visualization/plot_types.py",
> line 458, in set_width*
> *    self._refresh_display_width()*
> *  File
> "/data1/pdf/csurajit/yt-x86_64/src/yt-hg/yt/visualization/plot_types.py",
> line 476, in _refresh_display_width*
> *    self._redraw_image()*
> *  File
> "/data1/pdf/csurajit/yt-x86_64/src/yt-hg/yt/visualization/plot_types.py",
> line 423, in _redraw_image*
> *    self._run_callbacks()*
>  *  File
> "/data1/pdf/csurajit/yt-x86_64/src/yt-hg/yt/visualization/plot_types.py",
> line 263, in _run_callbacks*
> *    cb(self)*
> *  File
> "/data1/pdf/csurajit/yt-x86_64/src/yt-hg/yt/visualization/plot_modifications.py",
> line 312, in __call__*
> *    self.ncont = np.linspace(self.clim[0], self.clim[1], self.ncont)*
> *  File
> "/data1/pdf/csurajit/yt-x86_64/lib/python2.7/site-packages/numpy/core/function_base.py",
> line 74, in linspace*
> *    num = int(num)*
> *TypeError: only length-1 arrays can be converted to Python scalars*
>
>
> Please suggest me the most efficient way to achieve my goal (create a
> muti plot of density's at  different red-shift).
>
>
>
>
> --
> Reju Sam John
>
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>
>

-- 
Cameron Hummels
Postdoctoral Researcher
Steward Observatory
University of Arizona
http://chummels.org
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