×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*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.

# calculate intercept of two data sets

## calculate intercept of two data sets

(OP)
Is there a way to calculate the intercept of two data sets?

Example: I have a set of data "VX" which contains 100 points marking the X Points for data set 1 and 2.  I also have "VY1" which contains 100 points marking the Y points for data set 1, and "VY2" which contains 100 points marking the Y points for data set 2.  I want to calculate the X point that will return the same value when I do a linear interpolation of both sets of data.

In other words; how do I find the x value so that linterp(VX,VY1,X)=linterp(VX,VY2,X)?

### RE: calculate intercept of two data sets

(OP)
After reading my own post I figured out I can use a solve block.  I am still open to any suggestions you guys can offer.

X':=1
Given
linterp(VX,VY1,X')[ctrl+=]linterp(VX,VY2,X')
X:=Find(X')

### RE: calculate intercept of two data sets

That generally works well, with the possible exception when the intercept is near the end point of either line.  I've done this on some specific problems and endpoints can give you squirrelly results.

#### 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.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!