我试图在6个月的间隔期间找到最大值和第二大值。我使用runMax来查找第一个值,但我无法弄清楚如何为第二个值做。到目前为止,这是我的代码:
library(quantmod)
library(TTR)
getSymbols("GOOGL")
GOOGL_mo<-to.monthly(GOOGL)#to get monthly data
GOOGL_mo$Max_6mo<-runMax(GOOGL.High, 6)#add a column with the max value during a 6 months period
我想添加另一个具有第二大值的列,如下所示:
Date Open High Low Close Volume Max6mo 2ndMax6m0 Oct 2016 802.55 839.00 796.23 809.90 35391730 839.00 819.06 Nov 2016 810.87 816.04 743.59 775.88 48353316 839.00 819.06 Dec 2016 778.55 824.30 753.36 792.45 34356689 839.00 824.00 Jan 2017 800.62 867.00 796.89 820.19 36840255 867.00 839.00 Feb 2017 824.00 853.79 812.05 844.93 26492197 867.00 853.79 Mar 2017 851.38 874.42 824.30 847.80 34553208 874.42 867.00 Apr 2017 848.75 935.90 834.60 924.52 28721553 935.90 874.42 May 2017 924.15 965.90 920.80 942.17 21302485 965.90 935.90
有什么想法吗?
答案 0 :(得分:0)
这是一种方法:
return_string().c_str()
答案 1 :(得分:0)
library(quantmod)
library(TTR)
getSymbols("GOOG",src="google")
GOOG <- to.monthly(GOOG)
thing <- data.frame(max1 = rep(NA, 5), max2 = rep(NA, 5))
for (x in 1:(nrow(GOOG)-5)) {
max1 <- max(GOOG[x:(x+5), "GOOG.High"])
max2 <- max(GOOG$GOOG.High[x:(x+5)][GOOG$GOOG.High[x:(x+5)] != max1])
thing <- rbind(thing, data.frame(max1, max2))
}
GOOG <- cbind(data.frame(GOOG), thing)