[R] About the risk code in the fportfolio package

[lai]

Hello, 

I have a problem with fPortfolio recently. I am using below code:


Data = read.table("hf.txt",header = TRUE,sep = "")
Data = Data[, c("CA", "SS", "EM", "EMN", "ED", "DS", "MS", "RA", "FIA",
"GM", "LSE", "MF", "SP500", "NASDAQ", "JPM")]
d = as.timeSeries(Data)
class(d)
Spec = portfolioSpec()
setNFrontierPoints(Spec) = 1000
setRiskFreeRate(Spec) = 3
Constraints = "both"
Frontier = portfolioFrontier(d, Spec, Constraints)
frontierPlot(Frontier, pch = 19, col = c("black", "grey"), add = FALSE,
labels = TRUE, 
return = c("mean"), risk = c("Cov"), auto = TRUE, title = TRUE)
                               ~~~~~~~~~~                                                          


About the frontierPlot code
when I use Sigma in the risk code:
 
frontierPlot(Frontier, pch = 19, col = c("black", "grey"), add = FALSE,
labels = TRUE, 
return = c("mean"), risk = c("Sigma"), auto = TRUE, title = TRUE)
                              ~~~~~~~~~~~~  


there are the same plot!!! 
WHY? I use the different risk code
Could you tell me what the problem is?

much THANKS



                             
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