Calculate a Gaussian2D value and its partial derivatives with respect to x, y, xFWHM, and yFWHM.
x
y
xFWHM
yFWHM
x coordinate.
y coordinate.
full width at half maximum along the x axis.
full width at half maximum along the y axis.
the value and partial derivatives of the Gaussian2D function.
Calculate a Gaussian2D value and its partial derivatives with respect to
x,y,xFWHM, andyFWHM.