Data extraction and intersection of trendline offset through points

Hello everyone,

First I have to extract different sets of data, then I have to make a trendline through specific set of points, make an offset line and determinating their intersection (for every extracted set of data). If someone can help me I can describe problem in more detail.

Thank you, best regards.

Answer 1

[Walter Roberson]

Sounds like a job for the \ operator (which you can find described under the name "mldivide")

[Walter Roberson]

In classic Y=m*X+b form:

MB = [X(:),ones(length(X),1)] \ Y(:);

M = MB(1);

B = MB(2);

Answer 2

[can31]

I think I'll need more than this since I'm a newbie matlab user...