Dear Marco,

Thanks a lot for your explanations! Yes, it works. Thanks again for your help. Btw, may I ask you another thing? I have a PDF of normal distribution of a certain variable, like in this case, the value of a (please refer to below figure):

The mean value is 117, and the value of a varies from 100 to 130. May I know if there is a command to extract all of the values of a under the curve by following the Gaussian rule? I meant, I am expecting that many values of a will be located near the mean value then gradually decrease near to the tail. So I want to obtain all of values of a with an expectation that when later I plot those values, it will behave like Gaussian. Please kindly let me know if you know how to do so. Thanks in advance for your help!

Best Regards, Intan.