Linear Least Squares Regression with Eigen Dense Solver using QR decomposition and LU decomposition. The program also creates a GNUPlot script to plot the solution polynomial.

regressor [-d num] [--qr] <filename>

-d

Specifies the degree of the polynomial. The default value is 2.

--qr

Uses QR decomposition instead of LU decomposition. LU decomposition is the default behaviour.

filename

File to read the points from.

To find a 4th degree polynomial using the QR decomposition execute:

regressor -d 4 --qr file.txt

To find a 2nd degree polynomial using the LU decomposition execute:

regressor -d 2 file.txt

or

regressor file.txt