/usr/share/gnudatalanguage/lib/poly.pro is in libgnudatalanguage0 0.9.7-2.
This file is owned by root:root, with mode 0o644.
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;+
;
;
;
; NAME: POLY
;
;
; PURPOSE: Calculates the polynomial of X where with coefficients C
; and order n_elements(c)-1
;
;
;
; CATEGORY: Algebra/ mathematics
;
;
; CALLING SEQUENCE: result= POLY(x,c)
;
;
; OUTPUTS: result : c[0] + c[1]*x + c[2]*x^2 + ....
;
; RESTRICTIONS: X and C should be numbers
;
; PROCEDURE: Starting from the highest order (N=n_max) exponent loop
; to the lowest (N=1) adding x[N] and multipying by c[N]
;
;
; EXAMPLE: x=[1,2,3]
; c=[1,1,2]
; print, poly(x,c)
; 4 11 22
;
;
; MODIFICATION HISTORY:
; Written by: Christopher Lee 2005-07-08
;
;
;
;-
; LICENCE:
; Copyright (C) 2004,
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
;
;-
function poly, x,c
on_error, 2
IF (N_PARAMS() NE 2) THEN BEGIN
message, 'Incorrect number of arguments.'
ENDIF
nc=n_elements(c)
p=x*0.
for i=nc-1,1L,-1 do p=(p+c[i])*x
p=p+c[0]
return, p
end
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