aboutsummaryrefslogtreecommitdiff
path: root/math/curfit/cvvector.gx
blob: eb005a1a0550e0343763603fa063c3c291cf9682 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.

include <math/curfit.h>

$if (datatype == r)
include "curfitdef.h"
$else
include "dcurfitdef.h"
$endif

# CVVECTOR -- Procedure to evaluate  a curve. The CV_NCOEFF(cv) coefficients
# are assumed to be in COEFF.

$if (datatype == r)
procedure cvvector (cv, x, yfit, npts)
$else
procedure dcvvector (cv, x, yfit, npts)
$endif

pointer	cv		# curve descriptor
PIXEL	x[npts]		# data x values
PIXEL	yfit[npts]	# the fitted y values
int	npts		# number of data points

begin
	switch (CV_TYPE(cv)) {
	case LEGENDRE:
	    call $tcv_evleg (COEFF(CV_COEFF(cv)), x, yfit, npts, CV_ORDER(cv), 
		    CV_MAXMIN(cv), CV_RANGE(cv))
	case CHEBYSHEV:
	    call $tcv_evcheb (COEFF(CV_COEFF(cv)), x, yfit, npts, CV_ORDER(cv), 
		    CV_MAXMIN(cv), CV_RANGE(cv))
	case SPLINE3:
	    call $tcv_evspline3 (COEFF(CV_COEFF(cv)), x, yfit, npts,
	    			CV_NPIECES(cv), -CV_XMIN(cv), CV_SPACING(cv))
	case SPLINE1:
	    call $tcv_evspline1 (COEFF(CV_COEFF(cv)), x, yfit, npts,
	    			CV_NPIECES(cv), -CV_XMIN(cv), CV_SPACING(cv))
	case USERFNC:
	    call $tcv_evuser (cv, x, yfit, npts)
	}
end