please help me about Erfz

>> erfz

Error using erfz (line 18)

Not enough input arguments.

   error(nargchk(1, 1, nargin));

Answer 1

[Ameer Hamza]

It appears you are using erfz() from this FEX package: https://www.mathworks.com/matlabcentral/fileexchange/3574-erfz. You need to call it with an input argument. For example

>> erfz(1.5)
ans =
    0.9661

Also, MATLAB has a built-in function erf(): https://www.mathworks.com/help/releases/R2020a/matlab/ref/erf.html so you don't need that package.