Thanks to Quandl and RStudio, I can easily get the data of the interest rate and visualize it with R and dygraphs package!
You can understand how you download the data of the interest rate from Quandl and vizualize it as javascript graph(dygraphs) with R when you see the following document published in RPubs.
And also, You can download the entire content of the above document including R code from the following link:
