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Last modified: December 2009

URL: http://cxc-newtest.cfa.harvard.edu/ciao4.2/apply_transform.py.html
AHELP for CIAO 4.2

apply_transform

Context: py.transform

Synopsis

Apply a transform to the given data.

Syntax

apply_transform(transform, data)

Description

  • transform - input Transform object
  • data - data to be transformed

The apply_transform command applies the transform to the provided data. The resulting transformed data are returned. It is assumed that the data is appropriate for the transform definition.

Example

chips> cr = read_file("evt2.fits")
chips> trans = get_transform(cr, "MSC")
chips> data = np.array( [[4000.0, 4000.0],[5000.0,5000.0]],
dtype=np.double)
chips> odat = apply_transform(trans, data)
chips> print odat
[[ 3.59986812e+02 -1.31883328e-02]
[ 1.23478142e-01 1.23477855e-01]]

The "MSC" transform from evt2.fits is applied to the values (4000,4000) and (5000,5000).

Bugs

See the bug pages on the CIAO website for an up-to-date listing of known bugs.

See Also

py.transform
copy_transform, get_transform_type

Last modified: December 2009