Matlab does have the inbuilt functions erf and erfc. Type in "help erf" for more info.

Gokul

----- Original Message ----
From: #ARIJIT BISWAS#
To: m...
Sent: Friday, 19 October, 2007 7:32:18 AM
Subject: [matlab] integral of the Gaussian PDF

Hi all!

How do I find the integral of the Gaussian pdf in MATLAB? see e.g.

http://mathworld. wolfram.com/ NormalDistributi on.html

Is it like

0.5*erfc(-X/ sqrt(2))?

Best Regards,

Arijit
Hi Arijit,

For integral calculations the independent variable has to be defined as symbolic constant initially, then integration has to be carried out by mentioning the upper and lower limit within the int command.
once this is over the double or static integer value has to be calculaated.

Plz refer the following example, i hope it clears ur doubt:

Ex:
syms t;
y = 5 * exp(-(t).^2);
y1 = int(y,low_limit, upp_limit);

int_val = double(y1);

Regards,
Ashwini

Hi all!
>
>How do I find the integral of the Gaussian pdf in MATLAB? see e.g.
>http://mathworld.wolfram.com/NormalDistribution.html
>
>Is it like
>0.5*erfc(-X/sqrt(2))?
>
>Best Regards,
>Arijit
>