go-lm provides a basic implementation of weighted least squares (WLS) regression and regression with t-distributed residuals. These are implemented using the cgo interface, with the C code directly calling standard BLAS/LAPACK functions.

For WLS regression, two methods are provided via the Wls function. Setting method='q' will use the QR decomposition via the DGELS LAPACK routine. Setting method='c' (or anything else) will use the Cholesky decomposition via the DPOSV LAPACK routine.

For linear regression with t-distributed residuals, the optimal PX-EM algorithm of Meng & van Dyk (1997) is implemented via the LmT function.

This package requires a current Go installation with cgo enabled and the Atlas BLAS and LAPACK libraries to compile. It has been tested on Ubuntu 12.04 with the following packages installed:

sudo apt-get install libatlas3gf-base libatlas-base-dev liblapack golang build-essential

The entire package is provided under the MIT license.