taskGNU Astronomy Utilities - Tasks: task #15971, Arithmetic operators that take RNG...

 
 

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task #15971: Arithmetic operators that take RNG seed as argument

Submitted by:  Mohammad Akhlaghi <makhlaghi>
Submitted on:  Sun 23 May 2021 11:14:44 PM UTC  
 
Should Start On:  Sun 23 May 2021 11:00:00 PM UTC Should be Finished on:  Sun 23 May 2021 11:00:00 PM UTC
Category:  Table Priority:  5 - Normal
Item Group:  Enhancement Status:  Postponed
Privacy:  Public Percent Complete:  0%
Assigned to:  None Open/Closed:  Open
Effort:  0.00

Sun 23 May 2021 11:14:44 PM UTC, original submission:  

Currently when the user gives '--envseed' with multiple of the 'mknoise-*' operators of column arithmetic in Table, they will receive an increment in the given seed for every call of an 'mknoise-*' operator.

This will ensure that the command produces a reproducible sampling of the random distribution at a later time.

However, this has the limitation that if the order of the calls to the 'mknoise-*' change (for example the output columns are switched), different seeds will be used. This has no effect on the core concept of reproduciblity because the input command has changed. But is inconvenient when it happens to be necessary.

To fix this, each 'mknoise-*' operator should have a mirror 'mknoise-seed-*' operator which takes one extra argument (the random number generator seed). In this way, changing the order of the output columns won't affect the result (and it won't be necessary to call '--envseed').

Mohammad Akhlaghi <makhlaghi>
Project Administrator

 

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