描述在R中不起作用的功能

Question

我试图使用包中的describe功能psych.但是,我收到以下错误:

describe(ToothGrowth)中的错误:description必须是至少长度为1的字符串

我确保重新安装软件包,加载它,并附加data(ToothGrowth)数据集库中的示例但仍然出现此错误.

R version 3.1.2 (2014-10-31) 
Platform: x86_64-w64-mingw32/x64 (64-bit) 

locale: 
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C 
[5] LC_TIME=English_United States.1252 

attached base packages: 
[1] tools tcltk stats4 splines parallel grid compiler 
[8] stats graphics grDevices utils datasets methods base 

Answer 1

问题是testthat::describe覆盖psych::describe:

library(psych)
data(ToothGrowth)
describe(ToothGrowth)
# Warning in FUN(newX[, i], ...) :
#   no non-missing arguments to min; returning Inf
# Warning in FUN(newX[, i], ...) :
#   no non-missing arguments to max; returning -Inf
#       vars  n  mean   sd median trimmed  mad min  max range  skew kurtosis   se
# len      1 60 18.81 7.65  19.25   18.95 9.04 4.2 33.9  29.7 -0.14    -1.04 0.99
# supp*    2 60   NaN   NA     NA     NaN   NA Inf -Inf  -Inf    NA       NA   NA
# dose     3 60  1.17 0.63   1.00    1.15 0.74 0.5  2.0   1.5  0.37    -1.55 0.08

library(testthat)
# Attaching package: ‘testthat’

# The following object is masked from ‘package:psych’:

#     describe    <-- overrides describe function of psych package

# The following object is masked from ‘package:sos’:

#     matches

describe(ToothGrowth)
# Error in describe(ToothGrowth) : 
#   description must be a string of at least length 1

一种解决方案是加载testthat之前psych.另一个是说describe要使用哪个功能:

psych::describe(ToothGrowth)