Multipanel plots with images don't work

[karenlmasters]

Trying to put an image into the Multiplot example here: https://sdss-marvin.readthedocs.io/en/latest/tutorials/plotting-tutorial.html#multi-panel-map-plot-single-galaxy by swapping out one of the map commands with an image command

import matplotlib.pyplot as plt
import numpy as np
from marvin.tools import Maps
from marvin.tools.image import Image

maps = Maps('7977-12705')

halpha = maps.emline_gflux_ha_6564
nii_ha = np.log10(maps.emline_gflux_nii_6585 / halpha)
stvel = maps.stellar_vel
stsig = maps.stellar_sigma
stsig_corr = stsig.inst_sigma_correction()
image = Image(plateifu='7977-12705')


with plt.style.context('seaborn-darkgrid'):
    fig, axes = plt.subplots(nrows=2, ncols=2, figsize=(12, 11))
    halpha.plot(fig=fig, ax=axes[0, 0])
    nii_ha.plot(fig=fig, ax=axes[0, 1], title="log([NII]6585 / H-alpha)", snr_min=None)
    stvel.plot(fig=fig, ax=axes[1, 0])
    #stsig_corr.plot(fig=fig, ax=axes[1, 1])
    image.plot(fig=fig, ax=axes[1, 1])

Result does not put the image plot into the multipanel plot...?

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[havok2063]

Hi @karenlmasters the plot method on Maps objects is a custom function that handles matplotlib single panel or multi-panel plots. The Image.plot is a separate standalone plot function that just returns a single matplotlib figure. The ax=axes input to Image.plot isn't doing anything here. So I don't think what you want to do is possible out of the box. It's probably a good idea to make that work though.

You should be able to hack something together though, but you might need to use matplotlib directly, and extract the image data and maps data from the Marvin objects. You can take a look at the Image.plot code itself, https://github.com/sdss/marvin/blob/master/python/marvin/tools/image.py#L235-L275 itself. I know @KateRowlands needed to do something similar a while back, and may have some example code.