Changes

*In this formula, Suppose  <math>\mu</math> = 0 and <math>\sigma</math>= 1, then the distribution is called the standard normal distribution or the unit normal distribution.

*In this formula, Suppose  <math>\mu</math> = 0 and <math>\sigma</math>= 1, then the distribution is called the standard normal distribution or the unit normal distribution.

   This function will return the result as error when  any one of the argument is non-numeric and <math>sd<=0</math>.

   This function will return the result as error when  any one of the argument is non-numeric and <math>sd<=0</math>.

*when <math>cu</math> is TRUE , this formula is the integral from -<math>\infty</math> to <math>x</math> and <math>cu</math> is FALSE , we can use the same formula.

*when <math>cu</math> is TRUE , this formula is the integral from <math>-\infty</math> to <math>x</math> and <math>cu</math> is FALSE , we can use the same formula.

==Examples==

==Examples==