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.help msisqgrl Dec98 "Image Interpolation Package"
.ih
NAME
msisqgrl -- integrate the interpolant over a rectangular region
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SYNOPSIS
y = msisqgrl (msi, x1, x2, y1, y2)
.nf
pointer msi #I interpolant descriptor
real x1 #I lower x limit, 1 <= x1 <= nxpix
real x2 #I upper x limit, 1 <= x2 <= nxpix
real y1 #I lower y limit, 1 <= y1 <= nypix
real y2 #I upper y limit, 1 <= y2 <= nypix
.fi
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ARGUMENTS
.ls msi
Pointer to the sequential interpolant descriptor structure.
.le
.ls x1, x2
The x limits of integration
.le
.ls y1, y2
The y limits of integration.
.le
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DESCRIPTION
MSISQGRL integrates the interpolant exactly for rectangular domains
of integration, including partial pixel regions.
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NOTES
Checking for out of bound integration regimes is the responsibility of
the user. MSIFIT must be called before using MSISQGRL.
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SEE ALSO
msigrl
.endhelp
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