10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Greetings!
I need a quick way to change the format in a table of data
Here is an example of the input:
10 72 Value=177 VDB=0.0245 Value4=0,0,171,0
10 274 Value=238 VDB=0.0433 Value4=29,0,205,0
10 312 Value=222 VDB=0.0384 Value4=8,0,190,19
10 540 Value=405 VDB=0.0391 Value4=13,30,153,195... (3 Replies)
Discussion started by: Twinklefingers
3 Replies
2. Shell Programming and Scripting
Hi everyone!
I sometimes need to do some simple arithmetics, like adding a number to a certain column of a file. So I wrote a small function in the .bashrc file, which looks like this
shifter()
{
COL=$1
VAL=$2
FILE=$3
cp $FILE $FILE.shifted
awk 'NF==4 {$(( $COL )) = $(( $COL ))... (6 Replies)
Discussion started by: radudownload
6 Replies
3. Shell Programming and Scripting
Hi,
I have a file like this
ACC 2 2 21 aaa
AC 443 3 22 aaa
GCT 76 1 33 xxx
TCG 34 2 33 aaa
ACGT 33 1 22 ggg
TTC 99 3 44 wee
CCA 33 2 33 ggg
AAC 1 3 55 ddd
TTG 10 1 22 ddd
TTGC 98 3 22 ddd
GCT 23 1 21 sds
GTC 23 4 32 sds
ACGT 32 2 33 vvv
CGT 11 2 33 eee
CCC 87 2 44... (1 Reply)
Discussion started by: polsum
1 Replies
4. Linux
Hello,
I am a newbie to linux and struggling to find a better way to append a column in a text file.
Here is the file i want to modify: It has 8 columns (and thousands of rows). I want to append the first column by adding "chr" infront of the numbers. Some rows have a string in the first... (4 Replies)
Discussion started by: bjorngill
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5. Shell Programming and Scripting
Hello everyone,
I have a file with the following structure:
abc xyz 111 222
agf hjhf 787 799
tht yah 878 898
... ... ... ...
... ... ... ...
... ... ... ...
I want to add a column (with a fixed value of 1000) at the end such that it becomes:
abc xyz 111 222 1000
agf hjhf 787... (5 Replies)
Discussion started by: ad23
5 Replies
6. UNIX for Dummies Questions & Answers
If i have a file sample.txt with more than 10 columns and 11th column as following data. would it be possible to get the distinct counts of values in single shot,Thank you.
Y
Y
N
N
N
P
P
o
Expected Result:
Value count
Y 2
N 3
P 2 (2 Replies)
Discussion started by: Ariean
2 Replies
7. UNIX for Dummies Questions & Answers
Is there anyway to use awk to add a first column to my data that automatically goes from 1 to n , where n is the numbers of my rows?:confused: (4 Replies)
Discussion started by: cosmologist
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8. Shell Programming and Scripting
I have a txt file as follows
Code:
Oct 1 file1 4144
Oct 1 file23 5170
Oct 2 file5 3434
Oct 21 file56 2343
I need to add a new column by marking the right log file from current directory. For example populate like this. Please not in the second columt for "1" it has... (2 Replies)
Discussion started by: gubbu
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9. Shell Programming and Scripting
Hello Friends,
i used awk to sum up total size of files under a directory (with the help of examples, threads here).
ls -l | awk '/^-/ {total += $5} END {printf "%15.0f\n",total}' >> total.txt
After each execution of the script total result is appended into a text file:
7010
7794
8890 ... (7 Replies)
Discussion started by: EAGL€
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10. Shell Programming and Scripting
Hi,
I have a file "input.txt" with the following content :
5312,0,,,1,8,141.2,20090727
3714,0,,,1,8,285.87,20090727
5426,0,,,1,8,3.9,20090727
3871,0,,,1,8,30.4,20090727
9071,0,,,1,8,146.2,20090727
5141,0,,,1,8,2.8,20090727
0460,0,,,1,8,-0.1,20090727
7918,0,,,1,8,-0.1,20090727... (3 Replies)
Discussion started by: valokv
3 Replies
csv(n) CSV processing csv(n)
__________________________________________________________________________________________________________________________________________________
NAME
csv - Procedures to handle CSV data.
SYNOPSIS
package require Tcl 8.3
package require csv ?0.7.2?
::csv::iscomplete data
::csv::join values {sepChar ,} {delChar "}
::csv::joinlist values {sepChar ,} {delChar "}
::csv::joinmatrix matrix {sepChar ,} {delChar "}
::csv::read2matrix ?-alternate? chan m {sepChar ,} {expand none}
::csv::read2queue ?-alternate? chan q {sepChar ,}
::csv::report cmd matrix ?chan?
::csv::split ?-alternate? line {sepChar ,} {delChar "}
::csv::split2matrix ?-alternate? m line {sepChar ,} {expand none}
::csv::split2queue ?-alternate? q line {sepChar ,}
::csv::writematrix m chan {sepChar ,} {delChar "}
::csv::writequeue q chan {sepChar ,} {delChar "}
_________________________________________________________________
DESCRIPTION
The csv package provides commands to manipulate information in CSV FORMAT (CSV = Comma Separated Values).
COMMANDS
The following commands are available:
::csv::iscomplete data
A predicate checking if the argument data is a complete csv record. The result is a boolean flag indicating the completeness of the
data. The result is true if the data is complete.
::csv::join values {sepChar ,} {delChar "}
Takes a list of values and returns a string in CSV format containing these values. The separator character can be defined by the
caller, but this is optional. The default is ",". The quoting character can be defined by the caller, but this is optional. The
default is '"'.
::csv::joinlist values {sepChar ,} {delChar "}
Takes a list of lists of values and returns a string in CSV format containing these values. The separator character can be defined
by the caller, but this is optional. The default is ",". The quoting character can be defined by the caller, but this is optional.
The default is '"'. Each element of the outer list is considered a record, these are separated by newlines in the result. The ele-
ments of each record are formatted as usual (via ::csv::join).
::csv::joinmatrix matrix {sepChar ,} {delChar "}
Takes a matrix object following the API specified for the struct::matrix package and returns a string in CSV format containing these
values. The separator character can be defined by the caller, but this is optional. The default is ",". The quoting character can be
defined by the caller, but this is optional. The default is '"'. Each row of the matrix is considered a record, these are separated
by newlines in the result. The elements of each record are formatted as usual (via ::csv::join).
::csv::read2matrix ?-alternate? chan m {sepChar ,} {expand none}
A wrapper around ::csv::split2matrix (see below) reading CSV-formatted lines from the specified channel (until EOF) and adding them
to the given matrix. For an explanation of the expand argument see ::csv::split2matrix.
::csv::read2queue ?-alternate? chan q {sepChar ,}
A wrapper around ::csv::split2queue (see below) reading CSV-formatted lines from the specified channel (until EOF) and adding them
to the given queue.
::csv::report cmd matrix ?chan?
A report command which can be used by the matrix methods format 2string and format 2chan. For the latter this command delegates the
work to ::csv::writematrix. cmd is expected to be either printmatrix or printmatrix2channel. The channel argument, chan, has to be
present for the latter and must not be present for the first.
::csv::split ?-alternate? line {sepChar ,} {delChar "}
converts a line in CSV format into a list of the values contained in the line. The character used to separate the values from each
other can be defined by the caller, via sepChar, but this is optional. The default is ",". The quoting character can be defined by
the caller, but this is optional. The default is '"'.
If the option -alternate is specified a slightly different syntax is used to parse the input. This syntax is explained below, in the
section FORMAT.
::csv::split2matrix ?-alternate? m line {sepChar ,} {expand none}
The same as ::csv::split, but appends the resulting list as a new row to the matrix m, using the method add row. The expansion mode
specified via expand determines how the command handles a matrix with less columns than contained in line. The allowed modes are:
none This is the default mode. In this mode it is the responsibility of the caller to ensure that the matrix has enough columns to
contain the full line. If there are not enough columns the list of values is silently truncated at the end to fit.
empty In this mode the command expands an empty matrix to hold all columns of the specified line, but goes no further. The overall
effect is that the first of a series of lines determines the number of columns in the matrix and all following lines are
truncated to that size, as if mode none was set.
auto In this mode the command expands the matrix as needed to hold all columns contained in line. The overall effect is that after
adding a series of lines the matrix will have enough columns to hold all columns of the longest line encountered so far.
::csv::split2queue ?-alternate? q line {sepChar ,}
The same as ::csv::split, but appending the resulting list as a single item to the queue q, using the method put.
::csv::writematrix m chan {sepChar ,} {delChar "}
A wrapper around ::csv::join taking all rows in the matrix m and writing them CSV formatted into the channel chan.
::csv::writequeue q chan {sepChar ,} {delChar "}
A wrapper around ::csv::join taking all items in the queue q (assumes that they are lists) and writing them CSV formatted into the
channel chan.
FORMAT
The format of regular CSV files is specified as
[1] Each record of a csv file (comma-separated values, as exported e.g. by Excel) is a set of ASCII values separated by ",". For other
languages it may be ";" however, although this is not important for this case as the functions provided here allow any separator
character.
[2] If and only if a value contains itself the separator ",", then it (the value) has to be put between "". If the value does not con-
tain the separator character then quoting is optional.
[3] If a value contains the character ", that character is represented by "".
[4] The output string "" represents the value ". In other words, it is assumed that it was created through rule 3, and only this rule,
i.e. that the value was not quoted.
An alternate format definition mainly used by MS products specifies that the output string "" is a representation of the empty string. In
other words, it is assumed that the output was generated out of the empty string by quoting it (i.e. rule 2), and not through rule 3. This
is the only difference between the regular and the alternate format.
The alternate format is activated through specification of the option -alternate to the various split commands.
EXAMPLE
Using the regular format the record
123,"123,521.2","Mary says ""Hello, I am Mary""",""
is parsed into the items
a) 123
b) 123,521.2
c) Mary says "Hello, I am Mary"
d) (the empty string)
Using the alternate format the result is
a) 123
b) 123,521.2
c) Mary says "Hello, I am Mary"
d) "
instead. As can be seen only item (d) is different, now a " instead of the empty string.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category csv of
the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
SEE ALSO
matrix, queue
KEYWORDS
csv, matrix, package, queue, tcllib
CATEGORY
Text processing
COPYRIGHT
Copyright (c) 2002-2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>
csv 0.7.2 csv(n)