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Full Discussion: String Arithmetic ?
Top Forums UNIX for Dummies Questions & Answers String Arithmetic ? Post 302336754 by hkansal on Wednesday 22nd of July 2009 06:05:17 PM
Old 07-22-2009
String Arithmetic ?

Hello Experts,

In my shell I need to perform some simple subtraction on a value returned as a result of the "wc" command. The code:

Code:
scanFromLine="100"  ## This is returned as string as a result of some operation

totalLines=`wc -l "${latestLogFile}" | awk '{print $1}'` ## eg: 200

scanFromLine=`$(( ${totalLines} - ${scanFromLine} ))` ## this line throws an error

The error that I get is:
Code:
h1[227]: 200:  not found.

I am very positive that the error is not thrown because of the values being string. Please tell me my mistake here.

Regards,
HKansal
 

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PS_MAKESPOTCOLOR(3)							 1						       PS_MAKESPOTCOLOR(3)

ps_makespotcolor - Create spot color

SYNOPSIS
int ps_makespotcolor (resource $psdoc, string $name, [int $reserved]) DESCRIPTION
Creates a spot color from the current fill color. The fill color must be defined in rgb, cmyk or gray colorspace. The spot color name can be an arbitrary name. A spot color can be set as any color with ps_setcolor(3). When the document is not printed but displayed by an post- script viewer the given color in the specified color space is use. PARAMETERS
o $psdoc - Resource identifier of the postscript file as returned by ps_new(3). o $name - Name of the spot color, e.g. Pantone 5565. RETURN VALUES
The id of the new spot color or 0 in case of an error. EXAMPLES
Example #1 Creating and using a spot color <?php $ps = ps_new(); if (!ps_open_file($ps, "spotcolor.ps")) { print "Cannot open PostScript file "; exit; } ps_set_info($ps, "Creator", "spotcolor.php"); ps_set_info($ps, "Author", "Uwe Steinmann"); ps_set_info($ps, "Title", "Spot color example"); ps_begin_page($ps, 596, 842); ps_setcolor($ps, "fill", "cmyk", 0.37, 0.0, 0.34, 0.34); $spotcolor = ps_makespotcolor($ps, "PANTONE 5565 C", 0); ps_setcolor($ps, "fill", "spot", $spotcolor, 0.5, 0.0, 0.0); ps_moveto($ps, 100, 100); ps_lineto($ps, 100, 200); ps_lineto($ps, 200, 200); ps_lineto($ps, 200, 100); ps_lineto($ps, 100, 100); ps_fill($ps); ps_end_page($ps); ps_delete($ps); ?> This example creates the spot color "PANTONE 5565 C" which is a darker green (olive) and fills a rectangle with 50% intensity. SEE ALSO
ps_setcolor(3). PHP Documentation Group PS_MAKESPOTCOLOR(3)
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