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 使用常规数字而不是使用类似 e+10
的符号吗?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
在同一个向量内并希望看到:
within the same vector and want to see:
1810032000
# and
4
我正在为一个老式程序创建输出,我必须使用 cat
编写一个文本文件.到目前为止效果很好,但我根本无法在那里使用 e+10
符号.
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
这有点灰色地带.你需要记住,R 总是会调用一个打印方法,而这些打印方法会监听一些选项.包括scipen"——对科学展示的惩罚.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.决定打印时应用的惩罚固定或指数表示法的数值.积极的价值观偏向固定,偏向科学符号:固定符号将是首选,除非它更多比scipen"数字更宽.
‘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
话虽如此,我仍然觉得它值得一提.最直接的方法是使用具有显式宽度的 sprintf()
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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