我认为这是不可能的,因为整个 R 中的一般显示。?options 这么说关于数字:
‘digits’: controls the number of digits to print when printing
numeric values. It is a suggestion only. Valid values are
1...22 with default 7. See the note in ‘print.default’ about
values greater than 15.
关键词是“这只是一个建议”。
接下来,请注意打印的内容首先由应用的print() 方法控制(这在交互使用期间是隐藏的,因为R auto-print()s)。有关详细信息,请参阅?print 和?print.default 了解基本方法。从?print.default我们注意到
digits: a non-null value for ‘digits’ specifies the minimum number of
significant digits to be printed in values. The default,
‘NULL’, uses ‘getOption(digits)’. (For the interpretation
for complex numbers see ‘signif’.) Non-integer values will
be rounded down, and only values greater than or equal to 1
and no greater than 22 are accepted.
在详细信息部分我们有:
The same number of decimal places is used throughout a vector.
This means that ‘digits’ specifies the minimum number of
significant digits to be used, and that at least one entry will be
encoded with that minimum number. However, if all the encoded
elements then have trailing zeroes, the number of decimal places
is reduced until at least one element has a non-zero final digit.
Decimal points are only included if at least one decimal place is
selected.
digits 的默认值是 NULL,表示使用了 getOption("digits"),但正如我们已经指出的,这只是一个指南。
似乎没有一种方法可以将 R 配置为执行您想要的操作,也无法在全局范围内执行此操作。您需要重写 print.default() 或您需要使用的所有 print() 方法,并使用这些版本而不是标准版本 --- 现在使用 NAMESPACES 并不容易。