application manipulates the dimensionality of an NDF
. The input NDF can be projected
on to any n
-dimensional surface (line, plane, etc.
) by averaging the pixels in
perpendicular directions, or grown into new dimensions by duplicating an existing
-dimensional surface. The order of the axes can also be changed at the same time. Any
combination of these operations is also possible.
The shape of the output NDF is specified using Parameter AXES. This is a list of
integers, each element of which identifies the source of the corresponding axis of the
output–-either the index of one of the pixel axes of the input, or a zero indicating
that the input should be expanded with copies of itself along that axis. If any axis of
the input NDF is not referenced in the AXES list, the missing dimensions will be
collapsed to form the resulting data. Dimensions are collapsed by averaging all the
non-bad pixels along the relevant pixel axis (or axes).
manic in out
AXES( ) = _INTEGER (Read)
An array of integers which
define the pixel axes of the output NDF. The array should contain one value for
each pixel axis in the output NDF. Each value can be either a positive integer
or zero. If positive, it is taken to be the index of a pixel axis within the
input NDF which is to be used as the output axis. If zero, the output axis will
be formed by replicating the entire output NDF a specified number of times
(see Parameters LBOUND and UBOUND). At least one non-zero value must appear in
the list, and no input axis may be used more than once.
IN = NDF (Read)
The input NDF.
LBOUND( ) = _INTEGER (Read)
An array holding the lower
pixel bounds of any new axes in the output NDF (that is, output axes which
have a zero value in the corresponding element of the AXES parameter). One
element must be given for each zero-valued element within AXES, in order of
appearance within AXES. The dynamic default is to use 1 for every element.
OUT = NDF (Write)
The output NDF.
TITLE = LITERAL (Read)
for the output NDF. A null (
!) means use the title from the input NDF.
UBOUND( ) = _INTEGER (Read)
An array holding the upper pixel bounds of any new
axes in the output NDF (that is, output axes which have a zero value in the
corresponding element of the AXES parameter). One element must be given for
each zero-valued element within AXES, in order of appearance within AXES. The
dynamic default is to use 1 for every element.
transim [2,1] This transposes the two-dimensional NDF image so that its x pixel
co-ordinates are in the y direction and vice versa. The ordering of the axes
within the current WCS Frame will only be changed if the Domain of the current
Frame is PIXEL or AXES. For instance, if the current Frame has Domain
with Axis 1 being RA and Axis 2 being DEC, then these will be unchanged in the
output NDF. However, the Mapping which is used to relate (RA,DEC) positions to
pixel positions will be modified to take the permutation of the pixel axes
manic cube summ 3 This creates a one dimensional output
NDF called summ, in which the single pixel axis corresponds to the z (third)
axis in an input NDF called (cube). Each element in the output is equal to
the average data value in the corresponding xy plane of the input.
line plane [0,1] lbound=1 ubound=25 This takes a one-dimensional NDF called
line and expands it into a two-dimensional NDF called plane. The second pixel
axis of the output NDF corresponds to the first (and only) pixel axis in the
input NDF. The first pixel axes of the output is formed by replicating the
the input NDF 25 times.
manic line plane [1,0] lbound=1 ubound=25 This
does the same as the last example except that the output NDF is transposed.
That is, the input NDF is copied into the output NDF so that it is parallel to
pixel Axis 1 (x) in the output NDF, instead of pixel Axis 2 (y) as before.
manic cube hyper [1,0,0,0,0,0,3] ubound=[2,4,2,2,1] accept This manic example
projects the second dimension of an input three-dimensional NDF on to the plane
formed by its first and third dimensions by averaging, and grows the resulting
plane up through five new dimensions with a variety of extents.
This application permutes the NDF pixel axes, and any associated AXIS structures. It
does not change the axes of the current WCS co-ordinate Frame, either by permuting,
adding or deleting, unless that frame has Domain
"AXES". See the first
example in the