gawk

问题 as the toppic suggests, how to I read in information from multiple text files and only add elements 1 time in a an array regardless if they occur multiple times in the diffrent text files? I have started with this script that reads in and prints out all elements in the order that they occur in the different documents. For example take e look at these 3 diffrent text files containing the following data File 1: 2011-01-22 22:12 test1 22 1312 75 13.55 1399 2011-01-23 22:13 test4 22 1112 72 12.55

问题 I have a file : $ cat file 1,,"3.1,3.2",4,5 and because of the quotes I'm using FPAT = "([^,]*)|(\"[^\"]+\")") instead of just FS="," . I'm trying to replace a field, lets say $4 , with another value: $ gawk 'BEGIN{FPAT="([^,]*)|(\"[^\"]+\")"; OFS=","}{$4="new"; print}' file 1,,"3.1,3.2",new,,5 $ # right here ^ but I get a duplicated , ( OFS ) after the replaced field. It gets duplicated when modifying any field except last field or empty fields. Are you guys seeing this or is it just me in

问题 In awk, I have 2 fields: $1 and $2. They are both strings that I want to concatenate and assign to a variable. 回答1: Just use var = var1 var2 and it will automatically concatenate the vars var1 and var2 : awk '{new_var=$1$2; print new_var}' file You can put an space in between with: awk '{new_var=$1" "$2; print new_var}' file Which in fact is the same as using FS , because it defaults to the space: awk '{new_var=$1 FS $2; print new_var}' file Test $ cat file hello how are you i am fine $ awk '

来源： https://stackoverflow.com/questions/64560253/print-variable-inside-forward-slash

来源： https://stackoverflow.com/questions/33105808/can-i-pass-an-array-to-awk-using-v

来源： https://stackoverflow.com/questions/33105808/can-i-pass-an-array-to-awk-using-v

问题 Gnu AWK provides the built in function strftime() which can convert a timestamp like 1359210984 into Sat 26. Jan 15:36:24 CET 2013 . I couldn't find a function that would do this: seconds = timefromdate("Sat 26. Jan 15:36:24 CET 2013", "%a %d. %b %H:%M:%S CET %Y") or seconds = timefromdate("2013-01-26 15:36:24", "%Y-%m-%d %H:%M:%S") Whereas seconds then is 1359210984 . So, the date string should be convertable by a format pattern. I'd like to do this in gawk only. Edit 1: I'd like to convert

问题 I dont know Why I am unable to loop through all the records. currently it goes for last record and prints the normalization for it. Normalization formula: New_Value = (value - min[i]) / (max[i] - min[i]) Program { for(i = 1; i <= NF; i++) { if (min[i]==""){ min[i]=$i;} #initialise min if (max[i]==""){ max[i]=$i;} #initialise max if ($i<min[i]) { min[i]=$i;} #new min if ($i>max[i]) { max[i]=$i;} #new max } } END { for(j = 1; j <= NF; j++) { normalized_value[j] = ($j - min[j])/(max[j] - min[j])

问题 I'm trying different commands to process csv file where the separator is the pipe | character. While those commands do work when the comma is a separator, it throws an error when I replace it with the pipe: awk -F[|] "NR==FNR{a[$2]=$0;next}$2 in a{ print a[$2] [|] $4 [|] $5 }" OFS=[|] file1.csv file2.csv awk "{print NR "|" $0}" file1.csv I tried, "|" , [|] , /| to no avail. I'm using Gawk on windows. What I'm I missing? 回答1: You tried "|" , [|] and /| . /| does not work because the escape

问题 I have list of email addresses in a text file. I have a pattern having character classes that specifies what characters are allowed in the email addresses. Now from that input file, I want to only search the email addresses that has the characters other than the allowed ones. I am trying to write a gawk for the same, but not able to get it to work properly. Here is the gawk that I am trying: gawk -F "," ' $2!~/[[:alnum:]@\.]]/ { print "has invalid chars" }' emails.csv The problem I am facing