在 R 中运行但不在 Rscript 中运行

runs in R but not Rscript

这是我的脚本

library(Rcpp)
library(inline)

myroot2 <- rcpp(signature(xs="numeric"), body='double x=as<double>(xs); return wrap(::sqrt(x));')
print(myroot2(100))

如果我从 R 中获取这个脚本,它运行得很好

>source('test.R')
Attaching package: ‘inline’

The following object is masked from ‘package:Rcpp’:

registerPlugin

[1] 10

批处理模式

Rscript --verbose test.R
running
'/usr/local/share/bcbio/anaconda/lib/R/bin/R --slave --no-restore -- 
file=test.R'


Attaching package: ‘inline’

The following object is masked from ‘package:Rcpp’:

registerPlugin
Error in signature(xs = "numeric") : could not find function 
"signature"
Calls: rcpp -> cxxfunction
Execution halted

如何解决这个问题?

signature 函数在 methods 中,Rscript 显然没有默认加载。试试这个:

library(Rcpp)
library(inline)

myroot2 <- rcpp(methods::signature(xs="numeric"), body='double x=as<double>(xs); return wrap(::sqrt(x));')
print(myroot2(100))

唯一的变化是使用 methods::signature