apply data_range to all columns, including T, dT, L, dL #331
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This is affecting a currently-running experiment at ORNL - so would like to get merged soon! |
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You mean before we apply the slice? Is there a compact way to do that? It's tricky because they can be None, too. I didn't check what would happen if they were a scalar - if the load would still work. |
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An alternative fix is to use the following in np.asarray(v)[index] if hasattr(v, '__getitem__') else vAnd maybe rename the function to The existing code was already applying the index, but only if the item was a list. The ORSO reader is setting the values to numpy arrays, so the |
…ed, and allow specifying uncertainty for a column in a header field
… while also using data_range kwarg on load4
| (i for i, c in enumerate(columns) if getattr(c, "physical_quantity", None) == orso_name), | ||
| None, | ||
| ) | ||
| resolution_index = None |
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get_key() does not need to be defined in the for loop. It picks up the local scope regardless of where things are defined, so long as it is defined before it is used.
| # third column is always uncertainty on reflectivity | ||
| dR_col = columns[2] | ||
| if dR_col.value_is == "FWHM": | ||
| data[:, 2] = FWHM2sigma(data[:, 2]) |
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This modifies the entry in place as returned by the orso/nexus reader. That's probably okay, but since you are copying the data anyway on line 130, you may as well move the copy to line 62 so that you are operating on your own copy of the data. You might also force the data type to be float64 when you create the copy.
I'm a little concerned that ΔR is potentially being scaled by FWHM2sigma. Is there any risk that the ΔR column is mislabeled as FWHM, e.g., because it is defaulting to FWHM when the value isn't specified? This would be happening in the orso/nexus readers.
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Yes, there's a risk that the dR is not properly tagged as sigma or FWHM in the ORSO file. I don't really know how to mitigate that, since each "error" column or ErrorValue in the ORSO format independently describes whether it is sigma or FWHM. With that level of complexity, a single FHWM boolean flag like what we have in load4 is not helpful.
At least, in the implementation here, if the ORSO file is correctly described, it will correctly load, even if sigma and FWHM types are both present.
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I guess we could separate the parse step from the step that fills in the Probe classes, and allow users to edit parts of the ORSO classes before loading them...
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If the column is mislabeled in the stored file that's on the facility. The user can correct this manually after loading the file. My concern was whether the orso or nexus loaders default the ΔR column to FWHM if it is not otherwise labelled in the file.
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No, the value_is attribute does not default to "FWHM" - it actually defaults to None, which I guess we're interpreting to mean sigma here. In the ORSO code, it is indicated that not specifying FWHM implies that it is sigma.
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Fixes an issue where if a dataset with more than 4 columns is loaded (including T, dT, L or dL) and the
data_rangeflag is used, then the Q, R, dR, dQ columns are trimmed to the data range, but the additional columns are not.