Assuming that you start with an input record containing 16 fields, NF will initially be 16.
After the 1st time through the loop, NF will be 17 (16 + 1) with $17 set to $9 * 100.
After the 2nd time through the loop, NF will be 19 (17 + 2) with $19 set to $10 * 100.
After the 3rd time through the loop, NF will be 22 (19 + 3) with $22 set to $11 * 100.
...
After the 8th time through the loop, NF will be 52 (44 + 8) with $52 set to $16 * 100.
And all of the unset fields (18, 20, 21, 23, 24, 25, 27, ... 51) will default to the empty string.
Hi, I have a csv file with a key composed by 3 columns and some other numeric fields and I need to obtain the partial amounts by some part of the key. This may be some difficult to understand, so better see an example, where my input file is:
name,surname,department,y2004,y2005,y2006... (6 Replies)
Hi,
Can you please tell me how to add empty columns at the end csv file?
Currently there are 6 columns in the csv file. I want to add 35 empty columns at the end of this csv file.
Thanks,
Tushar (17 Replies)
Hi everybody,
I am new here and I need a reel help please
A have a csv file and I want to add new in the end of the file
Devisce Model,VMGuest Name,Host OS Name, Memory Size
Value1,Value2,Value3,Value4
Value5,Value6,Value7,Value8
Value9,Value10,Value11,Value12
And I want to add to new... (3 Replies)
Hi everybody,
I need some help please
I have a csv file named masterFile1.csv
header1,header2,header3
value1,value2,value3
value4,value5,value6
I am trying to add new columns in the end of the csv to have a new csv file named masterFile2.csv like this :... (3 Replies)
Hi Friends,
I have come across some files where some of the columns don not have data.
Key, Data1,Data2,Data3,Data4,Data5
A,5,6,,10,,
A,3,4,,3,,
B,1,,4,5,,
B,2,,3,4,,
If we see the above data on Data5 column do not have any row got filled. So remove only that column(Here Data5) and... (4 Replies)
Hello Members,
I have a csv file in the format below. Need help with awk statement to break nth column into 3 separate columns and export the changes to new file.
input file --> file.csv
cat file.csv|less
"product/fruit/mango","location/asia/india","type/alphonso"
need output in... (2 Replies)
Hi,
I would like extract some lines from file csv using awk , below the example:
I have the file test.csv with in content below.
FLUSSO;COD;DATA_LAV;ESITO
ULL;78;17/09/2013;OL
ULL;45;05/09/2013;Apertura
NP;45;13/09/2013;Riallineamento
ULLNP;78;17/09/2013;OL
NPG;14;12/09/2013;AperturaTK... (6 Replies)
I have a .CSV file (lets say named as file.csv) with numeric and string values. The string might contain commas hence they are enclosed in double quotes as in the below format.
column1,column2,column3,column4,column5,column6,column7
12,455,"string, with, quotes, and with, commas, in... (3 Replies)
Hi,
I have a file of csv data, which looks like this:
file1:
1AA,LGV_PONCEY_LES_ATHEE,1,\N,1,00020460E1,0,\N,\N,\N,\N,2,00.22335321,0.00466628
2BB,LES_POUGES_ASF,\N,200,200,00006298G1,0,\N,\N,\N,\N,1,00.30887539,0.00050312... (10 Replies)
Hi Guys,
Can you help to add static values at the end of the csv file with headers
input_file
id,name
1,neo
2,pull
Expected
id,name,status,entry,g_id
1,neo,done,2019-11-01T07:14:23,pass
2,pull,done,2019-11-01T07:14:23,pass
My try but not able replacing properly and unable... (1 Reply)
Discussion started by: Master_Mind
1 Replies
LEARN ABOUT V7
awk
AWK(1) General Commands Manual AWK(1)NAME
awk - pattern scanning and processing language
SYNOPSIS
awk [ -Fc ] [ prog ] [ file ] ...
DESCRIPTION
Awk scans each input file for lines that match any of a set of patterns specified in prog. With each pattern in prog there can be an asso-
ciated action that will be performed when a line of a file matches the pattern. The set of patterns may appear literally as prog, or in a
file specified as -f file.
Files are read in order; if there are no files, the standard input is read. The file name `-' means the standard input. Each line is
matched against the pattern portion of every pattern-action statement; the associated action is performed for each matched pattern.
An input line is made up of fields separated by white space. (This default can be changed by using FS, vide infra.) The fields are
denoted $1, $2, ... ; $0 refers to the entire line.
A pattern-action statement has the form
pattern { action }
A missing { action } means print the line; a missing pattern always matches.
An action is a sequence of statements. A statement can be one of the following:
if ( conditional ) statement [ else statement ]
while ( conditional ) statement
for ( expression ; conditional ; expression ) statement
break
continue
{ [ statement ] ... }
variable = expression
print [ expression-list ] [ >expression ]
printf format [ , expression-list ] [ >expression ]
next # skip remaining patterns on this input line
exit # skip the rest of the input
Statements are terminated by semicolons, newlines or right braces. An empty expression-list stands for the whole line. Expressions take
on string or numeric values as appropriate, and are built using the operators +, -, *, /, %, and concatenation (indicated by a blank).
The C operators ++, --, +=, -=, *=, /=, and %= are also available in expressions. Variables may be scalars, array elements (denoted x[i])
or fields. Variables are initialized to the null string. Array subscripts may be any string, not necessarily numeric; this allows for a
form of associative memory. String constants are quoted "...".
The print statement prints its arguments on the standard output (or on a file if >file is present), separated by the current output field
separator, and terminated by the output record separator. The printf statement formats its expression list according to the format (see
printf(3)).
The built-in function length returns the length of its argument taken as a string, or of the whole line if no argument. There are also
built-in functions exp, log, sqrt, and int. The last truncates its argument to an integer. substr(s, m, n) returns the n-character sub-
string of s that begins at position m. The function sprintf(fmt, expr, expr, ...) formats the expressions according to the printf(3) for-
mat given by fmt and returns the resulting string.
Patterns are arbitrary Boolean combinations (!, ||, &&, and parentheses) of regular expressions and relational expressions. Regular
expressions must be surrounded by slashes and are as in egrep. Isolated regular expressions in a pattern apply to the entire line. Regu-
lar expressions may also occur in relational expressions.
A pattern may consist of two patterns separated by a comma; in this case, the action is performed for all lines between an occurrence of
the first pattern and the next occurrence of the second.
A relational expression is one of the following:
expression matchop regular-expression
expression relop expression
where a relop is any of the six relational operators in C, and a matchop is either ~ (for contains) or !~ (for does not contain). A condi-
tional is an arithmetic expression, a relational expression, or a Boolean combination of these.
The special patterns BEGIN and END may be used to capture control before the first input line is read and after the last. BEGIN must be
the first pattern, END the last.
A single character c may be used to separate the fields by starting the program with
BEGIN { FS = "c" }
or by using the -Fc option.
Other variable names with special meanings include NF, the number of fields in the current record; NR, the ordinal number of the current
record; FILENAME, the name of the current input file; OFS, the output field separator (default blank); ORS, the output record separator
(default newline); and OFMT, the output format for numbers (default "%.6g").
EXAMPLES
Print lines longer than 72 characters:
length > 72
Print first two fields in opposite order:
{ print $2, $1 }
Add up first column, print sum and average:
{ s += $1 }
END { print "sum is", s, " average is", s/NR }
Print fields in reverse order:
{ for (i = NF; i > 0; --i) print $i }
Print all lines between start/stop pairs:
/start/, /stop/
Print all lines whose first field is different from previous one:
$1 != prev { print; prev = $1 }
SEE ALSO lex(1), sed(1)
A. V. Aho, B. W. Kernighan, P. J. Weinberger, Awk - a pattern scanning and processing language
BUGS
There are no explicit conversions between numbers and strings. To force an expression to be treated as a number add 0 to it; to force it
to be treated as a string concatenate "" to it.
AWK(1)