extend redshift range in N(z) test about descqa HOT 4 OPEN

Here's is a DESCQA run with simply modifying the N(z) test config file to increase the redshift range to z=3. Things look good.

Now we need to modify the code to allow setting a different validation range. I'll be developing this in the issue/138/extend-redshift-dist-test branch.

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Nice job on the modifications @yymao - this is a nice improvement of the dn/dz validation, and very timely for cosmoDC2. Many thanks!

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Thanks for this, Yao!

Could we add a single panel for a deeper sample without any validation data, just for the basic sanity check that there are no extremely strange features? (I mean right now each section has 3 panels with a blank space, so could the blank space have everything down to i<25.3 without a validation dataset shown?) Or has a basic sanity check of the overall N(z) for a deeper sample already been done in another context?

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@rmandelb @yymao The readiness test plots the basic distribution, as shown in this issue. The N(z) test does have the option of plotting distributions with no validation data. We just have to make a configuration file for it.

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