Hello,
My apologies if this has been posted elsewhere, I have had a look at several threads but I am still confused how to use these functions. I have two files, each with 5 columns:
File A: (tab-delimited)
PDB CHAIN Start End Fragment
1avq A 171 176 awyfan
1avq A 172 177 wyfany
1c7k A 2 7... (3 Replies)
Hi,
I have 20 tab delimited text files that have a common column (column 1). The files are named GSM1.txt through GSM20.txt. Each file has 3 columns (2 other columns in addition to the first common column).
I want to write a script to join the files by the first common column so that in the... (5 Replies)
Hi,
Can someone suggest me on how to join 4 files by comparing the first three columns?
---------- Post updated at 03:56 PM ---------- Previous update was at 03:42 PM ----------
Hope it helps someone.
I was looking online for a solution and on stackoverflow, I found a solution and tried... (6 Replies)
Hi,
I need to join two files together with one common value in a column. I think I can use awk or join or a combination but I can't quite get it.
Basically my data looks like this, with the TICKER columns matching up in each file
File1
TICKER,column 1, column, 2, column, 3, column 4
... (6 Replies)
Hi guys,
I hope you are doing well!
I have a file and I need to join two lines into one, but the second line I need only the last two columns.
=================
"eHealth Trend Report","logoRpt"
"LAN/WAN Group 123"
"Divide by Time"
"switch1_a-RH-Serial0"
"BW: 1.02 M"
... (4 Replies)
I would like to join two files when two columns in each file matches with each other and then produce an output when taking multiple columns.
Like I have file A
1234,ABCD,23,JOHN,NJ,USA
2345,ABCD,24,SAM,NY,USA
5678,GHIJ,24,TOM,NY,USA
5678,WXYZ,27,MAT,NJ,USA
and file B
... (2 Replies)
Join and merge multiple files with duplicate key and fill void columns
Hi guys,
I have many files that I want to merge:
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv: (5 Replies)
Hello,
This post is already here but want to do this with another way
Merge multiples files with multiples duplicates keys by filling "NULL" the void columns for anothers joinning files
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv:
1|123|jojo
1|NULL|bibi... (2 Replies)
Hi,
i have 2 files , the data i need to match is in masterfile and i need to pull out column 3 from master if column 1 and 2 match and output entire row to new file
I have tried with join and awk and i keep getting blank outputs or same file
is there an easier way than what i am... (4 Replies)
Discussion started by: axis88
4 Replies
LEARN ABOUT PLAN9
env
ENV(3) Library Functions Manual ENV(3)NAME
env - environment variables
SYNOPSIS
bind #e /env
/env/var1
/env/var2
...
DESCRIPTION
The env device serves a one-level directory containing files with arbitrary names and contents. The intention is that the file name is the
name of an environment variable (see rc(1)), and the content is the variable's current value.
When a fork(2) system call creates a new process, both the parent and the child continue to see exactly the same files in the env device:
changes made in either process can be noticed by the other. In contrast, an rfork system call with the RFENVG bit set (see fork(2)) causes
a split: initially both process groups see the same environment files, but any changes made in one process group cannot be noticed by the
other. An rfork with RFCENVG splits and then clears the environment.
SEE ALSO rc(1), fork(2)SOURCE
/sys/src/9/port/devenv.c
BUGS
A write starting at an offset after the current extent of a file yields an error instead of zero filling.
ENV(3)