How to append lists?

Questions
1

I have the 3 lists

t={1,2,3,4}
ch1={15,16,17,18}
ch2={23,24,25,26}

from which I want to create a new list

{{1,15,23},{2,16,24},{3,17,25},{4,18,26}}

How to do that?

Neither Join, Append nor Catenate help with it.

Any idea?

2

check out MapThread[]

3

Hi Ehud,

Transpose@{t, ch1, ch2}
(* {{1, 15, 23}, {2, 16, 24}, {3, 17, 25}, {4, 18, 26}} *)
4

Thanks! Can you also show me how to export this new list to a csv file that has the structure

t,ch1,ch2
1,15,23
2, 16, 24
3, 17, 25
4, 18, 26

?

5

Transpose@{t, ch1, ch2} // Prepend[{“t”, “ch1”, “ch2”}] // Export[“test.csv”, #] &