sub - subtracts Ultracam frames

sub subtracts two Ultracam frames and outputs a third.

Invocation

sub input1 input2 [coerce] output [nccd nwin]

output = input1 - input2

Arguments

input1 --- First input frame

input2 --- Second input frame. The windows of this frame must at least match or enclose those of the first frame.

coerce --- Coerce the second input file to match the first's format or not. Not always possible: needs binning factors to be correctly related and window start positions to match up correctly.

output --- Output frame

nccd --- CCD number if only one to be subtracted, except that 0 means all but then allows a particular window of each CCD to be handled.

nwin --- Window number if only one to be subtracted.

See also add, mul, div, uset, cadd, csub, cmul, cdiv.

Classes

This command is a member of the classes: Arithematic, Programs.

Author: T.R. Marsh
Author: T.R. Marsh

Page generated Fri Jul 5 12:23:42 2013

input1	---	First input frame
input2	---	Second input frame. The windows of this frame must at least match or enclose those of the first frame.
coerce	---	Coerce the second input file to match the first's format or not. Not always possible: needs binning factors to be correctly related and window start positions to match up correctly.
output	---	Output frame
nccd	---	CCD number if only one to be subtracted, except that 0 means all but then allows a particular window of each CCD to be handled.
nwin	---	Window number if only one to be subtracted.