User`s guide

plot
4-121
Plot the residuals.
subplot(2,1,2)
plot(fit1,'k-',x,y,'b.','residuals');
−8 −6 −4 −2 0 2 4 6 8
−1.5
−1
−0.5
0
0.5
1
1.5
2
x
y
data
excluded data
fitted curve
−8 −6 −4 −2 0 2 4 6 8
−0.5
0
0.5
1
1.5
2
x
y residual
data
zero line