×
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

How to program PLC for least Squares

How to program PLC for least Squares

How to program PLC for least Squares

(OP)
Can someone help me determine how to program a least squares routine for determining the slope and intercept for a number of xy coordinates?  I am using an AB Micrologix 1100. Thanks.

RE: How to program PLC for least Squares

This is sort of a dirty solution but you place your x data in the array starting at f9:0 and the corrosponding y data in F10:0.  Then you place the number of data points in N7:1.  Call the routine and it returns A in f11:12 and B in F11:16.  Use the equation y = A + Bx for your curve fitting.

I have uploaded a file but have not tested it but you should see how it works if I made a mistake.

Lanny

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