Code for finding extrapolated value when two point are given?

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RS
RS 2013-5-14
there are two point A (x1,y1)and B(x2,y2) given trying to extrapolate at third point c(x3,y3). I am knowing the value of A(x1,y1) and B(x2,y2), How can I compute the value of C(x3,y3).

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回答（2 个）

the cyclist
the cyclist 2013-5-14
You can use the MATLAB function interp1() to do extrapolation. Read
doc interp1
for details.
Be careful. Extrapolation is a tricky business.
Walter Roberson
Walter Roberson 2013-5-14
interp1()
Or just use standard geometry... y = m*x + b, m = (y2-y1)/(x2-x1)

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