bigSurvSGD              Big survival data analysis using stochastic
                        gradient descent
lambdaMaxC              Calculates the maximum penalty coefficient
                        lambda for which all coefficients become zero
oneChunkC               Updates the coefficients based on one pass of
                        data
oneObsPlugingC          Calculates the gradient and Hessian
                        corresponding to one individual
sparseSurvData          Simulated sparse survival dataset
survData                Simulated survival dataset
