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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 alpha trimmed mean line. The output means are returned in the array RESULT.
Invocation
CALL CCG_TM3x( ALPHA, NPIX, NLINES, STACK, MINPIX, RESULT, WRK1, POINT, USED, NCON,
NBAD, STATUS )
Arguments
ALPHA = REAL (Given)
The fraction of data to trim from upper and
lower orders. It must be greater than 0.0 and less 0.5.
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.
NBAD = INTEGER (Returned)
The number of bad values in the
output array.
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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