У вашего броузера проблема в совместимости с HTML5
Create a portfolio of stocks using stock price histories downloaded from Yahoo. We create an efficient frontier for a long-only portfolio and show how to graphically display the risk-return tradeoff and the allocations. We next show how to compare frontiers created with other constraints and compare them to the original long-only frontier
the R code is available on http://wp.me/pTp8L-3j