不确定为什么这个简单的重命名功能不起作用。我一直收到此错误消息：Error: All arguments to rename must be named.我在网上搜索过，有些人在使用rename包时遇到dplyr功能问题。我不是仅使用dplyr而是plyr个包。知道如何解决这个问题吗？
library(plyr)
df <- data.frame(V1=1:3, B=4:6, C=7:9)
df
SIM.data.bystudy.median <- rename(df, c("V1"="medianS"))
# Error: All arguments to rename must be named.
sessionInfo()的输出是：
R version 3.1.3 (2015-03-09)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1
locale:
[1] LC_COLLATE=English_Australia.1252 LC_CTYPE=English_Australia.1252 LC_MONETARY=English_Australia.1252 LC_NUMERIC=C
[5] LC_TIME=English_Australia.1252
attached base packages:
[1] parallel grid stats graphics grDevices utils datasets methods base
other attached packages:
[1] doBy_4.5-13 survival_2.38-1 stringr_0.6.2 dplyr_0.4.2 data.table_1.9.4 doParallel_1.0.8 iterators_1.0.7 foreach_1.4.2
[9] scales_0.2.4 reshape2_1.4.1 plyr_1.8.1 ggplot2_1.0.1 shiny_0.11.1
loaded via a namespace (and not attached):
[1] assertthat_0.1 chron_2.3-45 codetools_0.2-10 colorspace_1.2-6 DBI_0.3.1 digest_0.6.8 gtable_0.1.2
[8] htmltools_0.2.6 httpuv_1.3.2 labeling_0.3 lattice_0.20-30 lazyeval_0.1.10 magrittr_1.5 MASS_7.3-39
[15] Matrix_1.1-5 mime_0.3 munsell_0.4.2 proto_0.3-10 R6_2.0.1 RColorBrewer_1.1-2 Rcpp_0.11.5
[22] RJSONIO_1.3-0 splines_3.1.3 tools_3.1.3 xtable_1.7-4