Search notes:

Shell command: paste

Without command line options

paste file-1 file-2 … file-n

Without command line options, paste will read one line from each file and write each line, without new line, but separated by a tabulator. It will do that until the all lines are read.

So, if file_one contains

foo
bar
baz

and file_two contains

one
two
three

then paste file_one file_two will print

foo       one
bar       two
baz       three

This behavior is somewhat similar to that obtained with the shell command pr -mt … or with positional joins in DuckDB.

-d delimiter

-d specifies one or more delimiters (instead of the default tabulator) with which the lines will be pasted.

paste -d, file_one file_two will print

foo,one
bar,two
baz,three

-s don't read files in parallel

-s can be used to create a pivot from a file.

If some.txt contains

foo
10.3
18.9
17.1
bar
7.8
12.7
15.6
baz
11.4
15.1
16.4

then paste -d "\t\t\t\n" some.txt will print

foo	10.3	18.9	17.1
bar	7.8	12.7	15.6
baz	11.4	15.1	16.4

Note how each delimiter is used in sequence and then «recycled».

Examples

seq 10 | paste -sd+ | bc

calculates the sum of the first 10 integers: it will print 55.

Links

https://github.com/ReneNyffenegger/shell-commands/tree/master/paste

Index

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