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UNIX for Dummies Questions & Answers
Help in replacing column values
Post 302940294 by arunkumar_mca on Friday 3rd of April 2015 04:31:53 AM
04-03-2015
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.....
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I have a text file in the following format:
13412 NA06985 0 0 2 46.6432798439 4 4 4 4
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Hi,
I have a text file in the following format:
Code:
13412 NA06985 0 0 2 46.6432798439 4 4 4 4
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13412 NA06993 0 0 1 45.8022601455 4 4 2 4
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Hi Gurus,
I have a tab separated text file with two columns. I would like to make the first column values as headings for the second column values.
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Hi, i need help on replacing negative values in a column with 0. any quick fix on this? thanks much. for instance,
input:
1
2.3
-0.4
-25
12
13
45
-12
desired output
1
2.3
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hi all ,
( perl)
i am trying to replace jst one column in a file for eg
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Hi,
I have a tab delimited text file where some lines have the string "NA" in the second column. For these lines, I want to replace NA with the value in the first column, the symbol underscore followed by the value in the fourth column. How do I go about doing that? Thanks!
Input:
1 ... (3 Replies)
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Hi,
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Hello everyone,
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1 2 1;12.111.312-2;1.2;2;1-3
2 1 1;11.212.331-1;3.3;1;2-2
Output:
1 2 1;12111312;2;1.2;2;1-3
2 1 1;11212331;1;3.3;1;2-2
SED or PERL commands preferably.
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LEARN ABOUT PHP
str_ireplace
STR_IREPLACE(3) 1 STR_IREPLACE(3) str_ireplace - Case-insensitive version ofstr_replace(3). SYNOPSIS
mixed str_ireplace (mixed $search, mixed $replace, mixed $subject, [int &$count]) DESCRIPTION
This function returns a string or an array with all occurrences of $search in $subject (ignoring case) replaced with the given $replace value. If you don't need fancy replacing rules, you should generally use this function instead of preg_replace(3) with the i modifier. PARAMETERS
If $search and $replace are arrays, then str_ireplace(3) takes a value from each array and uses them to search and replace on $subject. If $replace has fewer values than $search, then an empty string is used for the rest of replacement values. If $search is an array and $replace is a string, then this replacement string is used for every value of $search. The converse would not make sense, though. If $search or $replace are arrays, their elements are processed first to last. o $search - The value being searched for, otherwise known as the needle. An array may be used to designate multiple needles. o $replace - The replacement value that replaces found $search values. An array may be used to designate multiple replacements. o $subject - The string or array being searched and replaced on, otherwise known as the haystack. If $subject is an array, then the search and replace is performed with every entry of $subject, and the return value is an array as well. o $count - If passed, this will be set to the number of replacements performed. RETURN VALUES
Returns a string or an array of replacements. EXAMPLES
Example #1 str_ireplace(3) example <?php $bodytag = str_ireplace("%body%", "black", "<body text=%BODY%>"); ?> NOTES
Note This function is binary-safe. Caution Replacement order gotcha Because str_ireplace(3) replaces left to right, it might replace a previously inserted value when doing multiple replacements. Example #2 in the str_replace(3) documentation demonstrates how this may affect you in practice. SEE ALSO
str_replace(3), preg_replace(3), strtr(3). PHP Documentation Group STR_IREPLACE(3)