spect_calc

Source: cli/stream/spect_calc.pro

 spect_calc
        Calculate a ratio or other combination from streams of the
        current dataset and add them as new streams.

 Usage:
        spect_calc, index, value

 Arguments:
        index   int     input   The stream index (2-element array)
        value   float   input   The value to combine with the stream.

 Keywords:
        ratio           If set, then form the ratio of the 2 streams (default
                        action).
        difference      If set, then form the difference between the streams.
        product         If set, then form the product of the 2 streams.
        sum             If set, then form the sum of the 2 streams
        power           If set, then raise a stream to a power.
        inverse         If set, then form the inverse of the first
                        stream (the scalar value is ignored).
        operation string The symbolic operation to perform.
        scalar_first    If set, then the calculation is <value> <op>
                        <stream> rather than <stream> <op> <value>
        panel   int     The panel index into which to insert then new
                        stream (if not given, then a new panel is
                        created).

 Notes:
        Only one type of operation can be applied for each
        invocation.

 Datasets:
        SPECT

 History:
        Original (after rate): 7/5/02; SJT