R 实用命令 2

1. how to temporarily unload the packages in R

> library(Daim)
载入程辑包：‘Daim’
The following objects are masked from ‘package:pROC’:
   auc, roc
Warning message:
程辑包‘Daim’是用R版本3.4.4 来建造的
> roc
function (x, ...)
UseMethod("roc")
<environment: namespace:Daim>
> library(pROC)
> roc
function (x, ...)
UseMethod("roc")
<environment: namespace:Daim>

use the unloadNamespace("Daim") to unload the Daim package

> unloadNamespace("Daim")
> roc
function (...)
{
    UseMethod("roc")
}
<environment: namespace:pROC>

Daim package has been removed.