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

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?

Answer 1

[Image Analyst]

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)

[Nickolas Vrvilo]

X and y are the arrays A and B. I forgot to mention in my code that A is the independent variable x and B is the dependent variable y. Thank you!