bash conditional sum 1

bash conditional sum

# Basic syntax:
awk '{ if ( condition ) { sum += $field; }} END { print sum }' your_file
# Where:
#	- $field is the field to sum if the condition is true

# Example usage:
# Sum all fields of column 5 in your_file that don't have "*" in field 3
awk '{ if ($3 != "*" ) { sum += $5; }} END { print sum }' your_file
# Note, explicitly setting your_file's field delimiter with 
#	"BEGIN { FS="" };" might be needed for non-standard 
#	delimiters

Here is what the above code is Doing:
1. The first line is the shebang line. This is a special line that tells the
shell what program to use to run the script. In this case, we’re using
awk.
2. The second line is a comment. Comments are ignored by the shell.
3. The third line is the actual awk command.
– The first part, ‘{ if ( condition ) { sum += $field; }}’, is the
condition. This is the part that tells awk what to do with each line
of the file. In this case, we’re telling awk to add the value of
field 5 to the variable sum if the value of field 3 is not equal to
“*”.
– The second part, ‘END { print sum }’, is the action. This is the part
that tells awk what to do after it’s done processing the file. In
this case, we’re telling awk to print the value of sum.
4. The fourth line is another comment.
5. The fifth line is an example of how to use the script.
6. The sixth line is another comment.

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