类似于head()的函数 [英] function similar to head() for matrix

问题描述

我正在寻找可以打印matrix [1:5，1:5]的任何程序包中的函数. head()对于那些只有几列但没有大矩阵的对象很有用.我知道我可以为此创建自己的函数，但是我想知道是否已经有一个函数.

I am looking for a function in any package that can print matrix[1:5, 1:5]. head() is good for those that have few columns but not for a large matrix. I know I can create my own function for it but I am wondering if there is a function for it already.

推荐答案

在名为futile.matrix的程序包中，有一个名为peek的函数.

There is a function called peek in a package called futile.matrix.

library(futile.matrix)
m <- matrix(c(1,3,4,2, 5,10,11,2, 3,42,8,22, 23,15,3,8), ncol = 4)
peek(m, 4)

从该功能的说明中:

"Peek是一个简单的实用程序，可以方便地查看 矩阵.这类似于头和尾，但是提供了二维 切片而不是完整的行."

"Peek is a simple utility to conveniently look at a portion of a matrix. This is similar to head and tail but provides a 2-dimensional slice instead of a complete row."

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