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Fix map write for custom axis name #1433

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merged 1 commit into from Jun 20, 2018
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@cdeil cdeil commented Jun 19, 2018

This PR fixes issue #1429 reported by @registerrier .

The key change is to use

s = 'AXIS%i' % i if name == '' else name
colnames = [s, s + '_MIN', s + '_MAX']

in make_axes_cols so that if the axis has a name, that name is used for the colnames.

The change in the test to add an axis name='spam' revealed the issue and now serves as a regression test:

axes1 = [MapAxis(np.logspace(0., 3., 3), interp='log', name='spam')]

@registerrier @woodmd - Please review.

@cdeil cdeil added the bug label Jun 19, 2018
@cdeil cdeil added this to the 0.8 milestone Jun 19, 2018
@cdeil cdeil requested review from registerrier and woodmd Jun 19, 2018
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@registerrier registerrier commented Jun 19, 2018

With this implementation, when the axis name is energy, the behavior is then to have column names: ENERGY E_MIN and E_MAX whatever the convention gadf or fgst-template.

This seems good to me as it is likely transparent for the user anyway. This might be what is actually stated in [the definition of the BANDS HDU] (http://gamma-astro-data-formats.readthedocs.io/en/latest/skymaps/index.html#bands-hdu).

@registerrier registerrier merged commit d1b9447 into gammapy:master Jun 20, 2018
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