GAUSS2 Name
GAUSS2
Author
Craig B. Markwardt, NASA/GSFC Code 662, Greenbelt, MD 20770
craigm@lheamail.gsfc.nasa.gov Purpose
Compute Gaussian curve given the mean, sigma and area.
Major Topics
Curve and Surface Fitting
Calling Sequence
YVALS = GAUSS2(X, Y, [XCENT, YCENT, SIGMA, PEAK])
Description
This routine computes the values of a Gaussian function whose
X-values, mean, sigma, and total area are given. It is meant to be
a demonstration for curve-fitting.
XVALS can be an array of X-values, in which case the returned
Y-values are an array as well. The second parameter to GAUSS1
should be an array containing the MEAN, SIGMA, and total AREA, in
that order. Inputs
X - 2-dimensional array of "X"-values.
Y - 2-dimensional array of "Y"-values.
XCENT - X-position of gaussian centroid.
YCENT - Y-position of gaussian centroid.
SIGMA - sigma of the curve (X and Y widths are the same).
PEAK - the peak value of the gaussian function.
Returns
Returns the array of Y-values. Example
p = [2.2D, -0.7D, 1.4D, 3000.D]
x = (dindgen(200)*0.1 - 10.) # (dblarr(200) + 1)
y = (dblarr(200) + 1) # (dindgen(200)*0.1 - 10.)
z = gauss2(x, y, p)
Computes the values of the Gaussian at equispaced intervals in X
and Y (spacing is 0.1). The gaussian has a centroid position of
(2.2, -0.7), standard deviation of 1.4, and peak value of 3000.
References
Modification History
Written, 02 Oct 1999, CM
Added copyright notice, 25 Mar 2001, CM