MATLAB: Significance test for least squares line

leas squares linelinear regressionsignificance test

Hello everyone,

I would like to ask how is it possible to do a significance test in the least squares line i plotted of 40 values reffering to wind direction. The least squares line is plotted with the lsline command.

What command do i need to conclude whether the tilt of this line is significant or not. What would be the inputs in this case?

Thanks in advance

Best Answer

Look at the regress command. You will want something like:

[b,bint,r,rint,stats] = regress(Wind,Year);

stats will contain the p-value that most people use to test whether the tilt is significant.

Related Solutions

MATLAB: Statistical Significance using ttest2

The paired t-test says nothing about correlation. (The 'unequal' flag is about the variances.)

Consider:

t = linspace(0, 10*pi);
v1 = sin(t);
v2 = 2*rand(size(t))-1;
[h,p] = ttest2(v1, v2)
h =
     0
p =
     0.6819

It does indicate if the means are different (rejecting the null hypothesis) at a specific significance.

EDIT — Added example.

Best Answer

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MATLAB: Statistical Significance using ttest2

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