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NumberMarks

Usage

NumberMarksInputForm及其相关函数的可选项,用来指定在近似数的输出形式中是否应包含 ` 标记.


Notes

NumberMarks 的缺省设置由的$NumberMarks值给出.
NumberMarks->True指明` 应被使用到除机器精度数和任意精度数外的所有近似数中.
NumberMarks -> Automatic指明应被使用在除机器精度数外的任意精度数中.
NumberMarks -> False 指明在输出数中从不使用 `.
• 数值标记用来指明数值的类型,及它们的精确度或准确度. • 科学记数法的*^形式总被使用在InputForm中,且与NumberMarks无关.
• 参见Mathematica 全书 : 2.11.3节 and 3.1.4节.
• 同时参见: NumberForm.
Further Examples

In standard output form, numbers are printed to 6 digits.

In[1]:=  

Out[1]=

In input form, all known digits are printed.

In[2]:=  

Out[2]//InputForm=

Here is an arbitrary-precision number in standard output form.

In[3]:=  

Out[3]=

In input form, Mathematica explicitly indicates the precision of the number and gives extra digits to make sure the number can be reconstructed correctly.

In[4]:=  

Out[4]//InputForm=

This makes Mathematica not explicitly indicate precision.

In[5]:=  

Out[5]//InputForm=