work with numbers in number

2 次查看（过去 30 天）
Lev Mihailov
Lev Mihailov 2019-11-19
回答： Walter Roberson 2019-11-19
Hello! I have the number 40.201109, I need to work with numbers 109, and then with 110 and at the end of 40. Help me how to separate them
  6 个评论
显示 4更早的评论
Walter Roberson
Walter Roberson 2019-11-19
You do not understand how you get that number.
If you have a number of the form AB.cdefgh then how should the output be formed?
Lev Mihailov
Lev Mihailov 2019-11-19
Here is an example of some mathematical operations that I can do with a pen, I need to automate it all
40.201109 a=40 b=110 c=109
x1=c+b*10^-5;
x2=x1+a-b;
x3=x2+c-x1^2
x4=......
x124=55.201992
there are many operations, but if I can get a, b, c, I can fully calculate everything

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2019-11-19
x = 40.201109;
xs = sprintf('%.6f', x);
a = str2double(xs(1:2));
b = str2double(xs(end-3:end-1));
c = str2double(xs(end-2:end));
This presumes there are exactly 6 significant decimal places. It is not generally possible to figure out how many significant decimal places a binary floating point number has -- for example 40.201109 is stored internally as 40.201109000000002424712874926626682281494140625 exactly.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by