Polyfit for 0 order polynomial

Dear all,

I am trying to plot a horizontal line (y=b and b is a constant) which is the least-square fitting to a set of data. Is that legit to set 'n' in polyfit as 0, say p = polyfit(x, y, 0) to have a horizontal least square fitting line?

Thanks, Ren

Answer 1

[Matt J]

It's legitimate, but it's also far simpler to do

p=mean(y);

[Ren]

Thanks Matt!