Added some more comments for a lesson plan. Fixed the time difference calculation to make sure its seconds and not minutes. Added plotting of the duration as a function of matrix size data set.
Added some more comments for a lesson plan. Fixed the time difference calculation to make sure its seconds and not minutes. Added plotting of the duration as a function of matrix size data set.

V3-Alliance/R_data_analytics_bigmemory_tutorial,V3-Alliance/R_data_analytics_bigmemory_tutorial,V3-Alliance/R_data_analytics_bigmemory_tutorial,V3-Alliance/R_data_analytics_bigmemory_tutorial