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Top Forums Shell Programming and Scripting Calculate difference between consecutive data points in a column from a file Post 302460845 by rdcwayx on Thursday 7th of October 2010 06:54:48 PM
Old 10-07-2010
Code:
awk 'NR==1{s=$1;next}{print $1-s;s=$1}' infile

-3.9736
4.5766
4.283
-1.667
0.1691
-9.8109
1.0048
-4.7105
11.466
-4.3766
6.707
3.787
1.111
-0.488
-6.204
0.942

 

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DB2_FIELD_TYPE(3)							 1							 DB2_FIELD_TYPE(3)

db2_field_type - Returns the data type of the indicated column in a result set

SYNOPSIS
string db2_field_type (resource $stmt, mixed $column) DESCRIPTION
Returns the data type of the indicated column in a result set. PARAMETERS
o $stmt - Specifies a statement resource containing a result set. o $column - Specifies the column in the result set. This can either be an integer representing the 0-indexed position of the column, or a string containing the name of the column. RETURN VALUES
Returns a string containing the defined data type of the specified column. If the specified column does not exist in the result set, db2_field_type(3) returns FALSE. SEE ALSO
db2_field_display_size(3), db2_field_name(3), db2_field_num(3), db2_field_precision(3), db2_field_scale(3), db2_field_width(3). PHP Documentation Group DB2_FIELD_TYPE(3)
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