What is this actually used for in the previuos code?
Code:
T[18] = "ZZZ"
Thanks!
Anything that will always sort higher than any value that can appear in the time field you're processing. If you were processing dates of the form YYYY/MM/DD HH:MM:SS you might choose something like 9999/99/99 99:99:99 and for a date of the form mmmmmmmm you might choose something like 99999999, but since digits sort before any uppercase alphabetic value in the POSIX Locale (and in most other locales), you could just as easily choose T[date_field_num]="A" (where date_field_num is the field number for the field you are comparing).
It denotes a date value to be used for comparisons to date fields in file2 once end-of-file has been encountered on file1.
This User Gave Thanks to Don Cragun For This Post:
Hi, i've two files (file1, file2) i want to take value (in column1) and search in file2 if the they match print the value from file2.
this is what i have so far.
awk 'FILENAME=="file1"{ arr=$1 }
FILENAME=="file2"
{print $0}
' file1 file2 (2 Replies)
I have very limited coding skills but I'm wondering if someone could help me with this. There are many threads about matching strings in two files, but I have no idea how to add a column from one file to another based on a matching string.
I'm looking to match column1 in file1 to the number... (3 Replies)
I have a file containing texts and indexes. I need the text between (and including ) INDEX and number "1" alone in line. I have managed this:
awk '/INDEX/,/1$/{if (!/1$/)print}' file1.txt
It works for all indexes.
And then I have second file with years and indexes per year, one per line... (3 Replies)
Hi.
How can we print those rows of file2 which are mentioned in file1. first character of file1 is a row number.. for eg
file1
1:abc
3:ghi
6:pqr
file2
a abc
b def
c ghi
d jkl
e mno
f pqr
... (6 Replies)
I have two files.
File 1 is a two-column index file, e.g.
comp11084_c0_seq6:130-468(-) comp12746_c0_seq3:140-478(+)
comp11084_c0_seq3:201-539(-) comp12746_c0_seq2:191-529(+)
File 2 is a sequence file with headers named with the same terms that populate file 1. ... (1 Reply)
I have a list of IDs in file1 and a list of sequences in file2. I can print sequences from file2, but I'm asking for help in printing the sequences in the same order as the IDs appear in file1.
file1:
EN_comp12952_c0_seq3:367-1668
ES_comp17168_c1_seq6:1-864
EN_comp13395_c3_seq14:231-1088... (5 Replies)
Hi, I wanted to add each row of file2.txt to entire length of file1.txt given the sample data below and save it as new file. Any idea how to efficiently do it. Thank you for any help.
input file
file1.txt file2.txt
140 30 200006 141 32
140 32 200006 142 33
140 35 200006 142... (5 Replies)
I am trying to use awk to find all the $2 values in file2 which is ~30MB and tab-delimited, that are between $2 and $3 in file1 which is ~2GB and tab-delimited.
I have just found out that I need to use $1 and $2 and $3 from file1 and $1 and $2of file2 must match $1 of file1 and be in the range... (6 Replies)
This is a question that is related to one I had last August when I was trying to sort/merge two files by millsecond time column (in this case column 6).
The script (below) that helped me last august by RudiC solved the puzzle of sorting/merging two files by time, except it gets lost when the... (0 Replies)
Discussion started by: aachave1
0 Replies
LEARN ABOUT BSD
join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is `-', the standard
input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
These options are recognized:
-an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-e s Replace empty output fields by string s.
-jn m Join on the mth field of file n. If n is missing, use the mth field in each file.
-o list
Each output line comprises the fields specified in list, each element of which has the form n.m, where n is a file number and m is a
field number.
-tc Use character c as a separator (tab character). Every appearance of c in a line is significant.
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.
The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.
7th Edition April 29, 1985 JOIN(1)