So I did what was suggested and made a fixed resolution buffer and got this:
What do the dots mean? And I guess the main thing is that I want to be able to modify the array and be able to, for example, multiply the values by a conversion factor, normalize some values if they are below a threshold etc using matplotlib and I’m not quite sure how to interpret the results in order to do so. Any help would be greatly appreciated.
Thanks so much! Julie
On Jan 21, 2018, at 12:04 PM, Nathan Goldbaum email@example.com wrote:
Your image contains the "density" field with a width of 10 in code units along each axis. So each row corresponds to the density value sampled over a 1x1 (in code units) region of your simulation, since you specified that you wanted a 10x10 image.
You might find the OffAxisProjectionPlot object to be a bit nicer to work with to make plots:
http://yt-project.org/doc/visualizing/plots.html#off-axis-projection-plots http://yt-project.org/doc/visualizing/plots.html#off-axis-projection-plots http://yt-project.org/doc/reference/api/yt.visualization.plot_window.html#yt... http://yt-project.org/doc/reference/api/yt.visualization.plot_window.html#yt...
OffAxisProjectionPlot presents the same interface as ProjectionPlot and will make a plot with axes and labels that should hopefully be easier to understand than the raw image you are dealing with now.
On Sun, Jan 21, 2018 at 10:42 AM, Julia Rakas <firstname.lastname@example.org mailto:email@example.com> wrote: Thank you! And I was wondering how exactly the output array corresponds to the image?
<Screenshot 2018-01-12 19.38.46.png>
For example, in the above ImageArray, what do the rows/colums mean?
Thanks again, Julie
On Jan 21, 2018, at 8:45 AM, Nathan Goldbaum <firstname.lastname@example.org mailto:email@example.com> wrote:
If I create a ProjectionPlot like so:
p = ProjectionPlot(ds, 'z', ('gas', 'density'))
Then I can access the image array you are looking for like this:
image = p.frb['gas', 'density']
This is using the FixedResolutionBuffer object that is associated with the ProjectionPlot. You also don't need to create a ProjectionPlot to do this, you can instead manually create a FixedResolutionBuffer object. See the following doc pages:
http://yt-project.org/doc/visualizing/manual_plotting.html#fixed-resolution-... http://yt-project.org/doc/visualizing/manual_plotting.html#fixed-resolution-... http://yt-project.org/doc/analyzing/generating_processed_data.html?highlight... http://yt-project.org/doc/analyzing/generating_processed_data.html?highlight... http://yt-project.org/doc/reference/api/yt.visualization.fixed_resolution.ht... http://yt-project.org/doc/reference/api/yt.visualization.fixed_resolution.ht...
Hope that helps,
On Sun, Jan 21, 2018 at 12:47 AM Julia Rakas <firstname.lastname@example.org mailto:email@example.com> wrote: Hello,
When I do yt.off_axis_projection(…) I get an array as an output. My question is how I can get an output array for regular projection plots? And does the output array correspond to the actual image that it otherwise would have plotted?
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