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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 combined
to form an broadened medium line. The broadened median is similar to a trimmed mean,
except that the trimming fraction changes with the number of values (and is equivalent to a
median for fewer than five values). The output means are returned in the array RESULT.
Invocation
CALL CCG_BM3x( NPIX, NLINES, STACK, MINPIX, RESULT, WRK1, POINT,
USED, NCON, NBAD, STATUS )
Arguments
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.
MINPIX = INTEGER (Given)
The minimum number of pixels
required to contribute to an output pixel.
RESULT( NPIX ) = ? (Returned)
The output
line of data.
WRK1( NLINES ) = ? (Returned)
Workspace for calculations.
POINT(
NLINES ) = INTEGER (Returned)
Workspace to hold pointers to the original positions
of the data before extraction and conversion in to the WRK1 array.
USED( NLINES )
= LOGICAL (Returned)
Workspace used to indicate which values have been used in
estimating a resultant value.
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 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 real and double-precision: replace "
x"
in the routine name by D or R as
appropriate. The STACK, RESULT, and WRK1 arguments supplied to the routine must have the data
type specified.
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