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Description:
This routine accepts
an array consisting a series of (vectorised) lines of data. The data values in the lines are then collapsed
to the maximum value in each line. The output maxima are returned in the array RESULT. Each
output variance value is the corresponding variance of the maximum data value, propagated from the
input variances given in array VARNCE and are returned in the array RESVAR. The vectorised
pixel indices corresponding to the maxima are also returned in POSIND.
Invocation
CALL CCG_MX1x( BAD, NPIX, NLINES, STACK, VARNCE, RESULT, RESVAR, POSIND, WRK1,
NCON, NBAD, STATUS )
Arguments
BAD = LOGICAL (Given)
If true, there may be bad
pixels present in the array. If false, it is safe not to check for bad values.
NPIX = INTEGER
(Given)
The number of pixels in a line of data.
NLINES = INTEGER (Given)
The number
of lines of data in the stack.
STACK( NPIX, NLINES ) = ? (Given)
The array of lines
which are to be combined into a single line.
VARNCE( NPIX, NLINES ) = ? (Given)
The
data variances.
RESULT( NPIX ) = ? (Returned)
The output line of data.
RESVAR(
NPIX ) = ? (Returned)
The output variances.
POSIND( NPIX ) = INTEGER (Returned)
The pixel indices of the maxima in each output pixel.
WRK1( NLINES ) = ? (Returned)
Workspace for calculations.
NCON( NLINES ) = DOUBLE PRECISION (Returned)
The actual
number of contributing pixels from each input line to the output line.
NBAD = INTEGER
(Returned)
The number of bad values in the output RESULT array created while forming the
statistics. It excludes those bad values whose corresponding values along the collapse axis
are all bad.
STATUS = INTEGER (Given and Returned)
The global status.
Notes:
-
There is a routine for each numeric data type: replace "
x"
in the routine name by D, R, I, W, UW, B or
UB as appropriate. The STACK, VARNCE, RESULT, RESVAR, and WRK1 arguments supplied to the
routine must have the data type specified.
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