没有适用于’时间< - '的方法适用于类“c('xts','zoo')的对象”

概述请将此数据结构放入R中以重现我的示例： dX <- structure(c(3272.1, 3271.48, 3281.03, 3267.08, 3260.65, NA, 1616.3, 1620.1, 1639.9, 1637.4, 1669.6, 1662.2, 528.385, 529.268, 531.022, 532.424, NA, NA), .indexTZ = "", clas 请将此数据结构放入R中以重现我的示例：

dX <- structure(c(3272.1,3271.48,3281.03,3267.08,3260.65,NA,1616.3,1620.1,1639.9,1637.4,1669.6,1662.2,528.385,529.268,531.022,532.424,NA),.indexTZ = "",class = c("xts","zoo"),.indexCLASS = c("POSIXct","POSIXt"),tclass = c("POSIXct",tzone = "",index = structure(c(1345147200,1345406400,1345492800,1345579200,1345665600,1345752000),"POSIXt")),.Dim = c(6L,3L),.Dimnames = List(NulL,c("M1WO.Index","GC1.COMB.Comdty","JGAGGUSD.Index")))

现在试试这段代码：

library(PerformanceAnalytics)library(quantmod)library(timeSerIEs)charts.PerformanceSummary(R = dX)

并得到此错误：

Error in UseMethod("time<-") :  no applicable method for 'time<-' applIEd to an object of class "c('xts','zoo')"

我想这个问题是关于class = c(“xts,”zoo“)的数据,但是我不明白为什么它会以那种格式读取那些数据,我怎么能将它强制转换为一个简单的xts对象.

我怎么能解决这个问题？

我的系统：

R version 2.15.1 (2012-06-22)Platform: i386-pc-mingw32/i386 (32-bit)locale:[1] LC_ColLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252   [3] LC_MONETARY=English_United States.1252[4] LC_NUMERIC=C                          [5] LC_TIME=English_United States.1252    attached base packages:[1] stats     graphics  Grdevices datasets  utils     methods   base     other attached packages: [1] timeSerIEs_2160.94           timeDate_2160.95             [3] quantmod_0.3-17              TTR_0.21-1                   [5] Defaults_1.1-1               PerformanceAnalytics_1.0.4.4 [7] xts_0.8-6                    zoo_1.7-7                    [9] rcom_2.2-5                   rscproxy_2.0-5              loaded via a namespace (and not attached):[1] fBasics_2160.81  fGarch_2110.80.1 grID_2.15.1      lattice_0.20-6  [5] MASS_7.3-18      stabledist_0.6-4 tools_2.15.1

当我加载包时,我得到以下内容：

Loading required package: zooAttaching package: ‘zoo’The following object(s) are masked from ‘package:base’:    as.Date,as.Date.numericLoading required package: timeDateAttaching package: ‘timeDate’The following object(s) are masked from ‘package:PerformanceAnalytics’:    kurtosis,skewnessAttaching package: ‘timeSerIEs’The following object(s) are masked from ‘package:zoo’:    time<-

根据错误信息,我猜这个问题来自于附加timeSerIEs和时间< - 被掩盖了来自package：zoo,我真的不知道它的含义以及如何处理.

解决方法 问题是package timeSerIEs.加载它会发出以下警告：

Attaching package: ‘timeSerIEs’The following object(s) are masked from ‘package:zoo’:    time<-

您可以分离包以使用charts.PerformanceSummary而不是再次加载它：

detach('package:timeSerIEs')detach('package:timeDate') # since it masks statistical functionscharts.PerformanceSummary(R = dX)library(timeSerIEs)

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