强制R不使用指数表示法(例如e + 10)? [英] Force R not to use exponential notation (e.g. e+10)?

问题描述

我可以强制R使用常规数字而不使用类似e+10的表示法吗?我有:

Can I force R to use regular numbers instead of using the e+10-like notation? I have:

1.810032e+09
# and 
4

在同一向量内并希望看到:

within the same vector and want to see:

1810032000
# and
4

我正在为老式程序创建输出，我必须使用cat编写文本文件. 到目前为止，效果还不错，但我在那里根本无法使用e+10表示法.

I am creating output for an old fashioned program and I have to write a text file using cat. That works fine so far but I simply can't use the e+10 notation there.

推荐答案

这是一个灰色区域.您需要回想一下，R总是会调用一个打印方法，而这些打印方法会监听某些选项.包括科学"-科学展示的惩罚.来自help(options):

This is a bit of a grey area. You need to recall that R will always invoke a print method, and these print methods listen to some options. Including 'scipen' -- a penalty for scientific display. From help(options):

"scipen":整数.决定打印时要加罚款 以固定或指数表示法的数字值.积极的 价值观偏向固定，对科学偏向 记数法:除非更多，否则将首选固定记数法 比"scipen"数字要宽.

‘scipen’: integer. A penalty to be applied when deciding to print numeric values in fixed or exponential notation. Positive values bias towards fixed and negative towards scientific notation: fixed notation will be preferred unless it is more than ‘scipen’ digits wider.

示例:

R> ran2 <- c(1.810032e+09, 4) 
R> options("scipen"=-100, "digits"=4)
R> ran2
[1] 1.81e+09 4.00e+00
R> options("scipen"=100, "digits"=4)
R> ran2
[1] 1810032000          4

话说回来，我仍然觉得它很有道理.最直接的方法是使用sprintf()具有明确的宽度，例如sprintf("%.5f", ran2).

That said, I still find it fudgeworthy. The most direct way is to use sprintf() with explicit width e.g. sprintf("%.5f", ran2).

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