If you're using num_runs to analyse multiple data sets, patterns and fits will usually all appear in one scan window. If you have e.g. multibank time-of-flight data it's hard to rapidly visualise changes in the patterns.

TOPAS academic v8 onwards will have a “filter” feature to get round this.

Go to “Global/Filter scans for display”. Type a regular expression in the text box and click “Apply filter to scan window”. For example, if you just want to see bank 5 plots from POLARIS, type something like “b5”.

The filter uses grep.exe in the background, so any grep regular expression is possible (period for any character; * for 0 or more occurences; [A-Za-Z.!?] for any English letter or period; etc). grep.exe will be installed in your main TOPAS directory. Type “grep.exe /?” for infomration.

If data sets are numbered sequentially it's easy to plot e.g. every 10th data set.

The filter is applied to whichever scan window is active. If you have two windows open, one could display bank 5 data only, and another bank 4 data only.