你好我得到这个错误试图优化投资组合的最小方差: Error in seq.default(from = round(min, rounding), to = round(max, rounding), :
'from' cannot be NA, NaN or infinite
优化利用的投资回报率,单纯,和电网运行正常,但所有这些方法都忽略了位置约束。随机和DEoptim同样的错误
我想使用使用R: library(pdfetch)
tickers <- c('FB','YHOO'.....etc long list of tickers)
pdfetch_YAHOO(tickers, fields = c("adjclose"),
from = as.Date("2017-04-01"),
to = as.Date("2017-04-30"))