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orbfour - show geometric fourier coefficients of an orbit
**orbfour
in=**orbit [parameter=value]

**orbfour** calculates the fourier coefficients
of an orbit by assuming you have sampled the orbit evenly. The first few
dominant coefficients are then immediately computed by a straight sum.
The
current implementation only shows the even cosine coefficients in the XY-plane.

The following parameters are recognized in any order if the
keyword is also given:
**in=***in-file*
- input file, in
*orbit(5NEMO)*
format [no
default]
**maxorder=***n*
- Maximum order of the fourier expansion used. [default:
**10**]

orbdim(1NEMO)
, orbit(5NEMO)
The algorithm is based on a
least squares fit, but assuming that sampling of the orbit has been done
properly only diagonal terms in the matrix are used, and hence no matrix
inversion is needed.
Peter Teuben

src/pjt/orbit` ` ` ` authors original sources

1-sep-90` ` ` ` V1.0: Created - only even cos terms` ` ` ` PJT

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