require(quantmod)
getSymbols(c('0700.HK','1297.HK','0763.HK'))
A_ret=dailyReturn(`0700.HK`)
B_ret=dailyReturn(`1297.HK`)
C_ret=dailyReturn(`0763.HK`)
dat=merge(A_ret,B_ret,C_ret)
require(timeSeries)
dat=as.timeSeries(dat)
require(fPortfolio)
Frontier = portfolioFrontier(dat)
Error in seq.default(min(mu), max(mu), length = nFrontierPoints) :
'from' cannot be NA, NaN or infinite
红体字部分出现问题，求各位大神解答~
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