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Top Forums Shell Programming and Scripting Deleting row if all column values are a particular string Post 302718301 by mouchkam on Friday 19th of October 2012 12:12:22 PM
Old 10-19-2012
Deleting row if all column values are a particular string

Hello,

I have a very large file for which I would like to remove all rows for which the value of columns 2-5 is zero.

For instance I would like this file:
Code:
contig1, 0, 0, 0, 0 
contig2, 1, 3, 5, 0 
contig3, 0, 0, 0, 0 
contig4, 0, 5, 6, 7

To become this file:
Code:
contig2, 1, 3, 5,0 
contig4, 0, 5, 6, 7

I'm aware that you can use 'Awk' to remove rows for which a particular column has a specific value, but I can't seem to figure out how to remove a row if multiple columns have to have a particular value (i.e zero).

Thanks!
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 10-19-2012 at 01:18 PM.. Reason: code tags, please!
 

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IFX_FETCH_ROW(3)							 1							  IFX_FETCH_ROW(3)

ifx_fetch_row - Get row as an associative array

SYNOPSIS
array ifx_fetch_row (resource $result_id, [mixed $position]) DESCRIPTION
Fetches one row of data from the result associated with the specified result identifier. Subsequent calls to ifx_fetch_row(3) would return the next row in the result set, or FALSE if there are no more rows. PARAMETERS
o $result_id -$result_id is a valid resultid returned by ifx_query(3) or ifx_prepare(3) (select type queries only!). o $position - An optional parameter for a "fetch" operation on "scroll" cursors: NEXT, PREVIOUS, CURRENT, FIRST, LAST or a number. If you specify a number, an "absolute" row fetch is executed. This parameter is optional, and only valid for SCROLL cursors. RETURN VALUES
Returns an associative array that corresponds to the fetched row, or FALSE if there are no more rows. Blob columns are returned as integer blob id values for use in ifx_get_blob(3) unless you have used ifx_textasvarchar(1) or ifx_byteasvar- char(1), in which case blobs are returned as string values. EXAMPLES
Example #1 Informix fetch rows <?php $rid = ifx_prepare ("select * from emp where name like " . $name, $connid, IFX_SCROLL); if (! $rid) { /* ... error ... */ } $rowcount = ifx_affected_rows($rid); if ($rowcount > 1000) { printf ("Too many rows in result set (%d) <br />", $rowcount); die ("Please restrict your query<br /> "); } if (! ifx_do ($rid)) { /* ... error ... */ } $row = ifx_fetch_row ($rid, "NEXT"); while (is_array($row)) { for (reset($row); $fieldname=key($row); next($row)) { $fieldvalue = $row[$fieldname]; printf ("%s = %s,", $fieldname, $fieldvalue); } printf(" <br />"); $row = ifx_fetch_row($rid, "NEXT"); } ifx_free_result ($rid); ?> PHP Documentation Group IFX_FETCH_ROW(3)
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