相关疑难解决方法(0)

有人可以解释下面的代码吗？我正在用我自己的版本替换图形包中的布局功能,但它似乎神奇地重新出现

env = environment( graphics:::layout )
unlockBinding( "layout" , env = env )
assign( "layout" , function(){} , envir = env )
lockBinding( "layout" , env = env )

# this still shows the original layout function!  how is that possible?
layout

# this shows function(){} as expected
graphics:::layout