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How to use matrix operations to find values of m and b in y=mx+b given two datasets to plot?

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Nickolas Vrvilo
Nickolas Vrvilo 2017-11-26
评论： Nickolas Vrvilo 2017-11-26
Hello,
Say I have array A = [ 0 1 2 3 4 ] and array B = [ 10 20 30 40 50]. If I am trying to plot the linear equation y=mx+b (A is the independent variable x and b is the dependent variable y), but do not know the values of m or b, how would I use matrix operations (like left hand division \) to find those values, and how would I then plot those values in a plot?

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Image Analyst
Image Analyst 2017-11-26
Not sure what x and y are, but if you're trying to fit B = mA+b, you can use polyfit:
% B = m * A + b;
A = [ 0 1 2 3 4 ]
B = [ 10 20 30 40 50]
coefficients = polyfit(A, B, 1)
m = coefficients(1)
b = coefficients(2)

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