Check order of adjustment terms

'adj.check.order' checks that the Cosine, Hermite or simple polynomials are of the correct order.

Usage

adj.check.order(adj.series, adj.order, key)

Arguments

adj.series: Adjustment series used ('cos','herm','poly')
adj.order: Integer to check
key: key function to be used with this adjustment series

Value

Nothing! Just calls stop if something goes wrong.

Details

Only even functions are allowed as adjustment terms, per p.47 of Buckland et al (2001). If incorrect terms are supplied then an error is throw via stop.

References

S.T.Buckland, D.R.Anderson, K.P. Burnham, J.L. Laake. 1993. Robust Models. In: Distance Sampling, eds. S.T.Buckland, D.R.Anderson, K.P. Burnham, J.L. Laake. Chapman & Hall.

Author

David Miller