Very fast generator of vectors from the standard multivariate normal or Gaussian distribution, truncated over the region [l,u]. The generator is designed for both speed and accuracy --- especially in the tail of the normal distribution, where the inverse transform method frequently breaks down due to underflow errors.
Reference: Botev, Z. I. (2016). "The normal law under linear restrictions: simulation and estimation via minimax tilting". Journal of the Royal Statistical Society: Series B (Statistical Methodology). doi:10.1111/rssb.12162
For more information, see: https://en.wikipedia.org/wiki/Truncated_normal_distribution
Zdravko Botev (2022). Truncated Normal Generator (https://www.mathworks.com/matlabcentral/fileexchange/53180-truncated-normal-generator), MATLAB Central File Exchange. Retrieved .
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