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NRAO Home > CASA > CASA Toolkit Reference Manual |
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coordsys.findaxis - Function
1.1.3 Find specified axis in coordinate system
Description
This function finds the specified axis in the Coordinate System. If the axis
does not exist, it throws an exception.
Arguments
Inputs |
| ||
world |
| is axis a world or pixel axis ?
| |
| allowed: | bool | |
| Default: | true |
|
axis |
| Axis in coordinate system
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| allowed: | int |
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| Default: | 0 |
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record
Example
"""
#
print "\t----\t findaxis Ex 1 \t----"
csys=cs.newcoordsys(direction=T, linear=2) # RA/DEC/Lin1/Lin2
rtn=csys.findaxis(T,1) # DEC
rtn
#{’axisincoordinate’: 1L, ’coordinate’: 0L}
rtn = csys.findaxis(T,2) # Lin1
rtn
#{’axisincoordinate’: 0L, ’coordinate’: 1L}
#
"""
In these examples, the Coordinate System has 2 coordinates and 4 axes
(0-rel, both world and pixel the same). The first example finds the
DEC axis (coordinate system axis 1) to be the second axis of the
Direction Coordinate (coordinate 0). The second example finds the
first linear axis (coordinate system axis 2) to be the first axis of
the Linear Coordinate (coordinate 1).
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Copyright © 2016 Associated Universities Inc., Washington, D.C.
This code is available under the terms of the GNU General Public Lincense
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