×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

help needed to fit dataset with two peaks

help needed to fit dataset with two peaks

help needed to fit dataset with two peaks

(OP)
I have a distribution with two peaks where the right hand one resemble Gaussian distribution. I want to fit a curve to the entire dataset, determine the minimum point between two peaks, cut data set using that figure, and try to fit some parametric distribution to both sets of data.

I managed to get very good non-parametric fit for the entire dataset (using dfittool) but cannot get its function (to be able to determine MIN). I tried to fit various polynomials but they do not produce good fit. Can anyone advise me how to get a function from the non-parametric fit?

RE: help needed to fit dataset with two peaks

I'm not sure I follow.  Your "cutting" of the distribution is bound to screw up any future parametric fits because the tails from the two distributions must be overlapping.

Seems to me, the way to do this is to directly fit to two parametric distributions.

TTFN



Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources