[yt-users] Inverting Plot Axes

[Nathan Goldbaum]

Hi Greta,

The development version of yt has a function called toggle_right_handed
that might be useful here.

Take a look at the following example: https://gist.github.com/
2937442f997bb16f5505fa470edb2480

Unfortunately you need to be using the development version to do this,
there's no workaround for the version you're using, since the call to
`invert_xaxis` needs to happen while the plot is getting set up. There are
instructions on how to build yt from source here:

http://yt-project.org/docs/dev/installing.html#installing-yt-using-pip-or-
from-source

Alternatively if you're using conda you can use the nightly conda builds:

http://yt-project.org/docs/dev/installing.html#nightly-conda-builds

Hope that's helpful,

Nathan

On Tue, Apr 11, 2017 at 12:00 AM, Greta Zhong <gretazhong at yahoo.com> wrote:

> Hi everyone!
>
> I’m trying to invert the horizontal axis on some simple projection plots.
> I’m trying to get a projection along the x axis, with y as the vertical and
> z as the horizontal axis where the horizontal/z axis is inverted, with the
> horizontal/z axis decreasing from left to right. Here’s the relevant code:
>
> ds.coordinates.x_axis[0] = 2
> ds.coordinates.x_axis['x'] = 2
> ds.coordinates.y_axis[0] = 1
> ds.coordinates.y_axis['x'] = 1
>
> This is just assigning the z axis (2) to the horizontal axis and the y
> axis (1) to the vertical axis.
>
> plot1 = yt.ProjectionPlot(ds,"x","velocity_x",weight_field='density')
> #plot1.plots["velocity_x"].axes.invert_xaxis()
> plot1.save()
>
> plot12 = yt.ProjectionPlot(ds,"x","density")
> #plot12.plots["density"].axes.invert_xaxis()
> plot12.save()
>
> And then I just use ProjectionPlot to make the plots. As you can see, I
> commented out a sort of matplotlib-y attempt to invert the horizontal axis,
> to no effect.
>
> I’ve attached two files: the first is what I’m getting with the above code
> (‘Projection_x_density_actual'), and the second illustrates the
> orientation I’d like (‘Projection_x_density_rotated'). Unfortunately, I
> got to the desired orientation by swapping my vertical/horizontal axes like
> this:
>
> ds.coordinates.x_axis[0] = 1
> ds.coordinates.x_axis['x'] = 1
> ds.coordinates.y_axis[0] = 2
> ds.coordinates.y_axis['x'] = 2
>
> and then just rotating the png in preview.
>
> I can’t find anything in the documentation about this besides the fact
> that we can use matplotlib objects to customize plots. I’d really
> appreciate any help on this!
>
> Thanks,
> Greta
>
>
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>
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