设置打印的默认小数位数

问题描述

我正在运行代码以生成输出，我希望所有输出以小数点后一位来打印。但是，代码使用的是我通常使用的函数，我不想在这些函数中指定打印输出是四舍五入的。

I am running code to produce outputs where I want all the outputs to be printed with 1 decimal place. However the code uses functions which I use generally and I don't want to specify within these that the printed output is rounded.

此问题的答案建议使用 options（digits = 2）或 round（x，digits = 2）。

The answers to this question Formatting Decimal places in R suggest using options(digits=2) or round(x, digits=2).

第一个选项是常规设置非常适合将 1.234 舍入为 1.2 ，但是会打印 12.345 如 12

The first option is a general setting which is great for rounding 1.234 to 1.2 but would print 12.345 as 12

第二个选项如果放在函数中会起作用，但我不想碰它们。一般如何设置？

The second option would work if put within the function but I don't want to touch them. How to set this generally?

推荐答案

您可以执行以下操作：

print <- function(x, ...) {
    if (is.numeric(x)) base::print(round(x, digits=2), ...)
    else base::print(x, ...)
}

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