R 用特定列上的条件替换值
我已经尝试将此自动化,并四处搜索,但效果不佳。我从雅虎财经下载了以下数据R 用特定列上的条件替换值,r,replace,multiple-columns,R,Replace,Multiple Columns,我已经尝试将此自动化,并四处搜索,但效果不佳。我从雅虎财经下载了以下数据 require(quantmod) tickers <- c("SPY") start <- "2020-01-01" end <- "2020-06-01" getSymbols(tickers, from = start, to = end, env =
require(quantmod)
tickers <- c("SPY")
start <- "2020-01-01"
end <- "2020-06-01"
getSymbols(tickers,
from = start,
to = end,
env = globalenv())
现在,我可以为一列运行以下代码
data$open <- ifelse(data$day < as.Date("2020-05-01"), data$open/100, data$open)
总的来说,我有两个问题
您可以在
dplyr 1.0.0
的中尝试使用:
library(dplyr)
data <- data.frame(date=index(SPY), coredata(SPY))
colnames(data) <- c("day", "open", "high", "low", "close", "volume", "adjusted_price")
to_replace <- c("open", "high", "low", "close", "volume", "adjusted_price")
data <- data %>%
mutate(across(to_replace, ~ if_else(day > as.Date("2020-05-1"), . / 100, .)))
库(dplyr)
数据您可以在dplyr 1.0.0
的中尝试使用:
library(dplyr)
data <- data.frame(date=index(SPY), coredata(SPY))
colnames(data) <- c("day", "open", "high", "low", "close", "volume", "adjusted_price")
to_replace <- c("open", "high", "low", "close", "volume", "adjusted_price")
data <- data %>%
mutate(across(to_replace, ~ if_else(day > as.Date("2020-05-1"), . / 100, .)))
库(dplyr)
数据
library(dplyr)
data <- data.frame(date=index(SPY), coredata(SPY))
colnames(data) <- c("day", "open", "high", "low", "close", "volume", "adjusted_price")
to_replace <- c("open", "high", "low", "close", "volume", "adjusted_price")
data <- data %>%
mutate(across(to_replace, ~ if_else(day > as.Date("2020-05-1"), . / 100, .)))