[SOLVED] Sort certain field but preserve other field data
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#!/usr/bin/gawk -f
BEGIN {
# Accept any newline convention, removing leading and trailing whitespace.
RS = "[\t\v\f ]*(\r\n|\n\r|\r|\n)[\t\v\f ]*"
# Field are spearated by whitespace.
FS = "[\t\v\f ]+"
# In output, use Unix newline convention,
ORS = "\n"
# TABs between fields, and
OFS = "\t"
# four decimal digits for floating-point values with 'print'.
OFMT = "%.4f"
# Clear the fourth and fifth field arrays.
split("", field4)
split("", field5)
# No fields yet.
fields = 0
# Clear current keys.
key1 = ""
key2 = ""
key3 = ""
}
# Output array contents.
function output() {
# Sort the fields.
asort(field4)
asort(field5)
# Output.
for (i = 1; i <= fields; i++)
print key1, key2, key3, field4[i], field5[i]
# Clear.
fields = 0
split("", field4)
split("", field5)
}
# Remove leading whitespace from first input line.
(FNR == 1) {
sub(/^[\t\v\f ]+/, "", $0)
}
# Input record:
{
# If any of the keys don't match, this is a new set.
if (key1 != $1 || key2 != $2 || key3 != $3) {
# Output the previous set, if any.
output()
key1 = $1
key2 = $2
key3 = $3
}
# Add data to current set.
fields++
field4[fields] = $4 * 1.0 # Make sure it is a number
field5[fields] = $5 * 1.0 # Make sure it is a number
}
# After the final input record, output the final set, if any.
END {
output()
}
This considers all consecutive lines where the first three fields match to be a single set. For each set, the values in the fourth field, and the values in the fifth field, are separately sorted in ascending order. The input is streamed, with just the three common fields and the values in fourth and fifth field for the current set kept in memory.
Integers are printed without a decimal point. If you want four decimal digits on all fourth and fifth field values, or perhaps some other format, use
in the output() function. The keys are treated as strings (and therefore will be exactly like they were in the input), but you can format them too if you want.
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