The Origin Forum

The Origin Forum

All Forums

Origin Forum

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:

UserName:

Password:

Anti-Spam Code:

Format Mode:

Format:

Message:

* HTML is OFF
* Forum Code is ON

Check here to include your profile signature.
Check here to subscribe to this topic.

T O P I C R E V I E W
wang2316@umn.edu	Posted - 07/07/2015 : 7:40:03 PM Hi, I have a question about log-normal fitting. I am using Originlab 9.1 (64bit, academic). I did a log-normal fitting, and I obtained Xc =114, w = 0.37. Now, I want to calculate SD. I found this website:http://www.originlab.com/forum/topic.asp?TOPIC_ID=19913 I followed the equation SD=sqrt(exp(2a+b^2)(exp(b^2)-1)) where a=w, b=ln(Xc). But it doesn't give me correct value of SD. I wonder who can tell me how to calculate SD from Xc and w. Thank you!
1 L A T E S T R E P L I E S (Newest First)
AmandaLu	Posted - 07/08/2015 : 06:34:20 AM Hi, This post is updated: http://www.originlab.com/forum/topic.asp?TOPIC_ID=19913 Please refer to the last reply from Shirley. Thanks, Amanda

The Origin Forum