How do I get percentage changes instead of absolute levels in my R data download?
To change absolute levels to percentage changes, use this call:
data <- Quandl("NSE/OIL", transform="rdiff")
Other transformations available include raw changes, normalized growth from 100 and cumulative sums:
data <- Quandl("NSE/OIL") # raw data
data <- Quandl("NSE/OIL", transform="diff") # changes
data <- Quandl("NSE/OIL", transform="rdiff") # percentage changes
data <- Quandl("NSE/OIL", transform="normalize") # growth from 100
data <- Quandl("NSE/OIL", transform="cumulative") # cumulative sum