Fix plot_error_map with BackendProperties set or BackendV2 (backport #7880) #7887
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* Fix plot_error_map In #7814 we updated the plot_error_map() error to be more general and also work with BackendV2 instead of assuming it's a BaseBackend or BackendV1 backend. However, as part of that refactor 2 errors were accidently introduced preventing the function from being used. First in the BackendV2 path we were incorrectly handling the backend name to use for the plot title. Secondly, in the BaseBackend/BackendV1 path the readout error array loop was incorrectly constructed resulting in the array being larger than expected causing an error. This commit fixes both conditions so that we can correctly plot the result. Fixes #7879 * Add tests for plot_error_map This commit adds test coverage for plot_error_map. The reason the issues around this function slipped in was a complete lack of test coverage. This adds some basic tests with both the BackendV1 and BackendV2 test paths to ensure we have some coverage for the function. * Add release note (cherry picked from commit d430e4d)
mtreinish
approved these changes
Apr 4, 2022
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This is an automatic backport of pull request #7880 done by Mergify.
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