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FREQ(1) General Commands Manual FREQ(1)
NAME
freq - count frequencies of keys in text
SYNOPSIS
freq [-d delim] [-k key] [file ...]
DESCRIPTION
freq counts the frequencies of each specified field for each line of text
input from each file. For each line, freq checks the field at the
specified key and increments the count for that value of the field. The
rest of the line is ignored.
After checking every line, the counts for each value are printed, in the
order in which they are encountered for the first time. The results are
printed with the frequency, then a <tab> character, then the value of the
field.
The following options are supported:
-d delim
Set the field delimiter to the character delim. The default is
any character of class space in the current locale (see
isspace(3)).
-k key Count the frequencies of the field found at position key, where
fields are separated by any number of delim characters. The
default value of key is 1, meaning that the first fields on each
line are counted. To use the whole line as a key, use the
special value of 0. If key fields are not found on a line, a
warning is printed and the whole line is ignored.
OPERANDS
file A pathname of an input file. If no file operand is specified, or
if the file operand is `-', then standard input is used. If file
does not refer to a valid file, then the operand is ignored.
EXIT STATUS
The freq utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
For a file named notes, containing the following data:
I bought pears
You sold apples
I bought apples
I bought oranges
I sold bananas
You ate bananas
Below are some examples of various invocations of freq with their
outputs:
$ freq notes
4 I
2 You
$ freq -k 2 notes
3 bought
2 sold
1 ate
SEE ALSO
cut(1), sort(1)
AUTHORS
phoebos <ben@bvnf.space>
ben's space March 21, 2022 ben's space
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