NotImplementedError: np.power is not implemented for Enhanced Map.

[Riddhi315]

Describe the bug

I am not able to apply np.power or ** on maps. I want to do this:- 10**(ha/hb) But I'm getting the NotImplementedError.

To Reproduce Steps to reproduce the behavior:

from marvin.tools.maps import Maps maps = Maps(plateifu='12483-9102') ha = maps.emline_gflux_ha_6564 hb = maps.emline_gflux_hb_4862 c= 10**(ha/hb) c.plot()

Screenshots

Desktop (please complete the following information):

• OS: [Linux]

• Browser [ chrome]

• Marvin version:- 2.7.3(latest version)

[havok2063]

@Riddhi315 Please see the documentation on the Marvin Map, https://sdss-marvin.readthedocs.io/en/latest/tools/map.html#. Only some array arithmetic is supported. For more complex operation, you should access the array values directly.

maps = Maps(plateifu='12483-9102')
ha = maps.emline_gflux_ha_6564
hb = maps.emline_gflux_hb_4862
ratio = ha/hb
c = 10**(ratio.value)

[Riddhi315]

@havok2063 I tried to do this as well. But I got this error:-

[havok2063]

@Riddhi315 the Marvin Map just wraps a numpy array, where the data are actually stored. When you call ratio.value you are accessing the underlying numpy data array. Numpy arrays do not have plot functions. See https://numpy.org/doc/stable/user/absolute_beginners.html. If you want to plot the numpy array data, you need to make the plot yourself, using a library like matplotlib, https://matplotlib.org/stable/tutorials/introductory/usage.html.

[Riddhi315]

I tried to do this as well.But I got this error:-

Thanks, Riddhi

On Tue, 28 Jun, 2022, 04:24 Brian Cherinka, @.***> wrote:

@Riddhi315 https://github.com/Riddhi315 Please see the documentation on the Marvin Map, https://sdss-marvin.readthedocs.io/en/latest/tools/map.html#. Only some array arithmetic is supported. For more complex operation, you should access the array values directly.

maps = Maps(plateifu='12483-9102') ha = maps.emline_gflux_ha_6564 hb = maps.emline_gflux_hb_4862 ratio = ha/hb c = 10**(ratio.value)

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