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Full Discussion: Arithmetic calculations in bash file
Top Forums Shell Programming and Scripting Arithmetic calculations in bash file Post 302774903 by Don Cragun on Sunday 3rd of March 2013 07:43:02 PM
Old 03-03-2013
Quote:
Originally Posted by kristinu
I have 2 numbers

Code:
xmin = 0.369000018
xmax = 0.569000006

and want to calculate

Code:
(xmax- xmin) / 5.0

I have tried using $(( )) but is always giving an error
The bash shell doesn't perform non-integer arithmetic.
You can do it with a recent (newer than 1988) Korn shell:
Code:
xmin=0.369000018
xmax=0.569000006
printf "%.10f\n" $(( (xmax - xmin) / 5.0))

which produces:
Code:
0.0399999976

 

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LEARN ABOUT DEBIAN

plsvpa

PLSVPA(3plplot) 						    PLplot API							   PLSVPA(3plplot)

NAME

       plsvpa - Specify viewport in absolute coordinates

SYNOPSIS

       plsvpa(xmin, xmax, ymin, ymax)

DESCRIPTION

       Alternate  routine  to plvpor(3plplot) for setting up the viewport.  This routine should be used only if the viewport is required to have a
       definite size in millimeters.  The routine plgspa(3plplot) is useful for finding out the size of the current subpage.

       Redacted form: plsvpa(xmin, xmax, ymin, ymax)

       This function is used in example 10.

ARGUMENTS

       xmin (PLFLT, input)
	      The distance of the left-hand edge of the viewport from the left-hand edge of the subpage in millimeters.

       xmax (PLFLT, input)
	      The distance of the right-hand edge of the viewport from the left-hand edge of the subpage in millimeters.

       ymin (PLFLT, input)
	      The distance of the bottom edge of the viewport from the bottom edge of the subpage in millimeters.

       ymax (PLFLT, input)
	      The distance of the top edge of the viewport from the bottom edge of the subpage in millimeters.

AUTHORS

       Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot.  This man page was automatically generated from the DocBook  source  of  the
       PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.

SEE ALSO

       PLplot documentation at http://plplot.sourceforge.net/resources.

								   August, 2012 						   PLSVPA(3plplot)
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