Library data.table在Mac上出现问题(R版本3.0.2(2013-09-25)-“飞盘航行”
关于以下方面的数据: 守则:Library data.table在Mac上出现问题(R版本3.0.2(2013-09-25)-“飞盘航行”,r,data.table,R,Data.table,关于以下方面的数据: 守则: library(data.table) library(reshape2) library(lubridate) df = fread("Watertable_fluctuations_All_Original.txt", skip = 1, header = T) # dropbox file df = df[, date := dmy(date)] tables(df) dfm = melt(df, id.vars = "date",
library(data.table)
library(reshape2)
library(lubridate)
df = fread("Watertable_fluctuations_All_Original.txt",
skip = 1, header = T) # dropbox file
df = df[, date := dmy(date)]
tables(df)
dfm = melt(df, id.vars = "date", value.name = "water.level")
wl.threshold = -0.22
dfm[water.level < wl.threshold,.N, keyby = variable] # count per measuring station
setkey(dfm,variable); dfm[water.level < wl.threshold,.N, by = key(dfm)].
产生以下问题:
> tables(df)
如果(mb){:
论证不能用逻辑解释
祖萨里奇:沃恩梅尔敦:
在if(mb){
将Länge>1和其他元素与benutzt联系起来
及
setkeyv中的Fehler(x,cols,verbose=verbose):x不是data.table
及
Fehler在[.data.frame
(dfm,变量==“Yel342(2010)”)中:
对象“变量”nicht gefunden
救命啊
> tables(df)
> dfm[water.level < wl.threshold,.N, keyby = variable] # count per measuring station
> setkey(dfm,variable); dfm[water.level < wl.threshold,.N, by = key(dfm)].
+ ref.y = wl.threshold)