googleVis version 0.5.8 released

Hi, I would like to know how I can possibly control the legend size/location on the top right plot. Thank you very much.

With the current version (0.1.9) of ChainLadder we don't have that option. However, you find the underlying R code on GitHub, see line 410 onwards.

Hi, under the MackChainLadder function, what does assuming a tail factor of 1.05 and standard error of 0.02 mean? How do you obtain those numbers?

See the help file to MackChainLadder for more details, but also the references given there, in particular the original Mack paper