| bigeigen | Big eigenvalue calculation | 
| fusedL2DescentGLMNet | Optimise the fused L2 model with glmnet (using transformed input data) | 
| fusedLassoProximal | Fused lasso optimisation with proximal-gradient method. (Chen et al. 2010) | 
| fusedLassoProximalIterationsTaken | Following a call to fusedLassoProximal, returns the actual number of iterations taken. | 
| generateBlockDiagonalMatrices | Generate block diagonal matrices to allow for fused L2 optimization with glmnet. |