I'm working in QGIS 2.18.3.
I have point layer which represents GPS points along a transect line. I would like to randomly select 5 points along this transect, i.e. from this layer.
Somehow I expected this to be straight forward, but I seem to miss something here.
I used Research Tools --> Random selection within subset, selected the transect as input layer, Latitude as ID Field (Latitude = Real), Number of selected features (for the count instead of percentage) and entered 5 as number of selected features.
After pressing "Run" the process runs without problems as the process bar proceeds to 100%, then closes and I receive no error message.
However, nothing has been selected, i.e. no 5 points are highlighted in the attribute table (header still shows selected=0).
Am I using the function in a wrong way or do I expect the wrong output?