How to select Point in Grid in other diection

Hi, I need to select point in the ‘colums’ of this point grid. I managed to do this in the other direction (X-asis) with the ‘cull patron’, bur now i have to select the same point ‘true, false,…’ in the other direction. Has anyboby an idea? I don’ have a lot of experience; Thank you!

Hello,

You are probably after Relative Item, but uploading your GH file with internalized geometry would help !