Tell me please.

Question - 1

There are several arrays. a=[1;2...4], b=[7;8..10], c=[12;13...15]

How do I combine them so that it turns out as follows - d=[1,2,3,4,7,8,9,10,12,13,14,15]

Question - 2

There is an array a=[1;2...10], I need to exclude several values from it so that it turns out as follows a=[1,2,5,6,7,9,10]

q-1-2.sm (3 KiB) downloaded 22 time(s).

One way (stack use)

q-1-2_ser.sm (6 KiB) downloaded 45 time(s).
sergio

Wrote

Question - 2

Make it algo style, add/remove cols.
This way you will have in-situ as desired.
Welcome to Smath Community ... Jean.

thank a lot, all options are excellent!)

Wrote

Thank a lot, all options are excellent !

Appreciated ... more in there ... Jean.

Utilities Matrix Extractors.sm (56 KiB) downloaded 31 time(s).

In addition to sergio's answer, you can use an custom exclude function.
It will remove substances of a L# list from master M# list.

Regards

exclude.sm (5 KiB) downloaded 29 time(s).