taskGNU Astronomy Utilities - Tasks: task #16363, New section explaining "STD...

 
 

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task #16363: New section explaining "STD vs. Error"

Submitter:  Raul Infante-Sainz <infantesainz>
Submitted:  Fri 05 May 2023 06:48:41 AM UTC
   
 
Should Start On:  Fri 05 May 2023 12:00:00 AM UTC Should be Finished on:  Fri 05 May 2023 12:00:00 AM UTC
Category:  Book Priority:  5 - Normal
Item Group:  Documentation Status:  Ready For Test
Privacy:  Public Assigned to:  infantesainz
Percent Complete:  100% Open/Closed:  Closed
Effort:  0.00

Mon 15 May 2023 11:20:21 PM UTC, comment #3: 

This work has been merged into the 'master' branch in Commit d281fb9aaa4. Thanks a lot for the initiative to add this Raul! It was a very important section!

Mohammad Akhlaghi <makhlaghi>
Group administrator
Mon 15 May 2023 09:58:36 PM UTC, comment #2: 

I found the problem: I was mistakenly using the number of images instead of the size of each image!

I am busy completing the description.

Mohammad Akhlaghi <makhlaghi>
Group administrator
Mon 15 May 2023 07:33:50 PM UTC, comment #1: 

Thanks Raul!

The added discussion too theoretical, so I edited it to be more practical (actually making randomly valued images and measuring everything) in Commit d44f10be4e15 of the 'stderr' branch of my development project on Gitlab.

In the end, I reach a strange result that I don't have time to investigate (1: the equation doesn't hold, 2: the error in mean doesn't change with number of images). They are explained in a "cartouche" at the end of that section.

Can you read the new version of this section and see what I am getting wrong?

Mohammad Akhlaghi <makhlaghi>
Group administrator
Fri 05 May 2023 06:48:41 AM UTC, original submission:  

Until now, we did not have a section explaining the difference between the standard deviation and the error, and sometimes this causes confusion.

In the commit below, I added a small section explaining this in a clear and short way. I hope this solve some confusions. Please feel free to change and discuss anything you may think it is necessary. I would also ensure that what it is explained in the section is true. I.e., std measurements are performed directly on the inputs while errors came from the STD datasets.

https://gitlab.com/infantesainz/gnuastro/-/commit/2e8ff723


Raul Infante-Sainz <infantesainz>
Group Member

 

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    Date Changed by Updated Field Previous Value => Replaced by
    2023-05-15 makhlaghi Percent Complete90% 100%
        Assigned toNone infantesainz
        Open/ClosedOpen Closed

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