Documentation>MATLAB API>SPECIAL - vl_dgaussian

Y=VL_DGAUSSIAN(X) evaluates the derivative of the standard Gaussian density.

To obtain the Gaussian density of standard deviation S, do

  Y = 1/S^2 * VL_DGAUSSIAN(X/S) .

See also: VL_GAUSSIAN(), VL_DDGAUSSIAN(), VL_HELP().