gawk

问题 Suppose I have a text file with records of the following form, where the FS is generally speaking a comma, and the RS is generally speaking a newline. However, the exception to this rule is that if a field is in quotes, it should treat the line breaks and commas as part of the field. "This field contains line breaks and is quoted but it should be treated as a single field",1,2,3,"another field" How can I use awk to parse such a file correctly, where I can still access $1,$2... , as I usually

问题 Suppose I have a text file with records of the following form, where the FS is generally speaking a comma, and the RS is generally speaking a newline. However, the exception to this rule is that if a field is in quotes, it should treat the line breaks and commas as part of the field. "This field contains line breaks and is quoted but it should be treated as a single field",1,2,3,"another field" How can I use awk to parse such a file correctly, where I can still access $1,$2... , as I usually

问题 This question already has an answer here : Appending an element to associative array awk (1 answer) Closed 4 years ago . GNU awk supports multidimensional arrays: q[1][1] = "dog" q[1][2] = 999 q[2][1] = "mouse" q[2][2] = 777 q[3][1] = "bird" q[3][2] = 888 I would like to sort the "second column" of q such that I am left with: q[1][1] = "mouse" q[1][2] = 777 q[2][1] = "bird" q[2][2] = 888 q[3][1] = "dog" q[3][2] = 999 as you can see the "first column" values moved to keep with the second. I

问题 This question already has an answer here : Appending an element to associative array awk (1 answer) Closed 4 years ago . GNU awk supports multidimensional arrays: q[1][1] = "dog" q[1][2] = 999 q[2][1] = "mouse" q[2][2] = 777 q[3][1] = "bird" q[3][2] = 888 I would like to sort the "second column" of q such that I am left with: q[1][1] = "mouse" q[1][2] = 777 q[2][1] = "bird" q[2][2] = 888 q[3][1] = "dog" q[3][2] = 999 as you can see the "first column" values moved to keep with the second. I

问题 I have a data file with two columns. I want to find out the maximum data value from the second column and divide each entries of second column witht he maximum value. (So I will get all the entries in second column <= 1.00). I tried with this command below: awk 'BEGIN {max = 0} {if ($2>max) max=$2} {print ($2/max)}' angleOut.dat but I get error message as below. awk: (FILENAME=angleOut.dat FNR=1) fatal: division by zero attempted note: There are some data in the second column which is zero

问题 I have a data file with two columns. I want to find out the maximum data value from the second column and divide each entries of second column witht he maximum value. (So I will get all the entries in second column <= 1.00). I tried with this command below: awk 'BEGIN {max = 0} {if ($2>max) max=$2} {print ($2/max)}' angleOut.dat but I get error message as below. awk: (FILENAME=angleOut.dat FNR=1) fatal: division by zero attempted note: There are some data in the second column which is zero

问题 I have a data file with two columns. I want to find out the maximum data value from the second column and divide each entries of second column witht he maximum value. (So I will get all the entries in second column <= 1.00). I tried with this command below: awk 'BEGIN {max = 0} {if ($2>max) max=$2} {print ($2/max)}' angleOut.dat but I get error message as below. awk: (FILENAME=angleOut.dat FNR=1) fatal: division by zero attempted note: There are some data in the second column which is zero

问题 I have a data file with two columns. I want to find out the maximum data value from the second column and divide each entries of second column witht he maximum value. (So I will get all the entries in second column <= 1.00). I tried with this command below: awk 'BEGIN {max = 0} {if ($2>max) max=$2} {print ($2/max)}' angleOut.dat but I get error message as below. awk: (FILENAME=angleOut.dat FNR=1) fatal: division by zero attempted note: There are some data in the second column which is zero

问题 The Beta release of gawk 4.2.0, available in http://www.skeeve.com/gawk/gawk-4.1.65.tar.gz is a major release, with many significant new features . I previously asked about What is the behaviour of FS = " " in GNU Awk 4.2?, and now I noticed the brand new typeof() function to deprecate isarray(): Changes from 4.1.4 to 4.2.0 The new typeof() function can be used to indicate if a variable or array element is an array, regexp, string or number. The isarray() function is deprecated in favor of

问题 The Beta release of gawk 4.2.0, available in http://www.skeeve.com/gawk/gawk-4.1.65.tar.gz is a major release, with many significant new features . I previously asked about What is the behaviour of FS = " " in GNU Awk 4.2?, and now I noticed the brand new typeof() function to deprecate isarray(): Changes from 4.1.4 to 4.2.0 The new typeof() function can be used to indicate if a variable or array element is an array, regexp, string or number. The isarray() function is deprecated in favor of