You could use awk to split each group of data into separate files and skipping NA lines, then paste them together.

awk '/^NA$/ && !NA{N++; NA=1; next} !/^NA$/{print >"file"N; NA=0}
    END{system("paste file*")}' inile.txt

The NA flag is used to create files in sequencial order, we could use below instead.

awk '/^NA$/{N++; next} !/^NA$/{print >"file"N}
    END{system("paste file*")}' inile.txt

The output is:

4 3 2
3 4 7
5 5 4
7 2 6
8   9
3

You could use awk to split each group of data (where those are between NA lines) into separate files and skipping NA lines, then paste them together.

awk '/^NA$/ && !NA{N++; NA=1; next} !/^NA$/{print >"file"N; NA=0}
    END{system("paste file*")}' inile.txt

The NA flag is used to create files in sequencial order, we could use below instead.

awk '/^NA$/{N++; next} !/^NA$/{print >"file"N}
    END{system("paste file*")}' inile.txt

The output is:

4 3 2
3 4 7
5 5 4
7 2 6
8   9
3

You could use awk to split each group of data into separate files, then paste them together.

awk '/^NA$/ && !NA{N++; NA=1; next} !/^NA$/{print >"file"N; NA=0} END{system("paste file*")}' inile.txt

The output is:

4 3 2
3 4 7
5 5 4
7 2 6
8   9
3

You could use awk to split each group of data into separate files and skipping NA lines, then paste them together.

awk '/^NA$/ && !NA{N++; NA=1; next} !/^NA$/{print >"file"N; NA=0}
    END{system("paste file*")}' inile.txt

The NA flag is used to create files in sequencial order, we could use below instead.

awk '/^NA$/{N++; next} !/^NA$/{print >"file"N}
    END{system("paste file*")}' inile.txt

The output is:

4 3 2
3 4 7
5 5 4
7 2 6
8   9
3