regress error, number of rows

Hej,

I try to do a multi linear regression between two vectors, but I recieve an error in the length of the vector, although the number of rows is equal (size: 1540x4 and size: 1540x1), see below. Can anyone explain this error and how to fix it?

cheers,

Jeroen

>> b = regress(Mean_wall_1(:,[5 10 11 12]),Q_201_cl(:,2));

Error using regress (line 62)

Y must be a vector and must have the same number of rows as X.

>> size(Mean_wall_1(:,[5 10 11 12]))

ans =

1540 4

>> size(Q_201_cl(:,2))

ans =

1540 1

Answer 1

[Fangjun Jiang]

Switch your X and Y. Read the help of regress()

[Jeroen van Eldert]

Thanks,

I overlooked in 4 times, still the error message does not make sence..

/Jeroen

[Fangjun Jiang]

Agreed. Many times the error message is rather confusing.