How to extract the first four and last four digits of all numbers of an array where each number is of 12 digits?

23 次查看（过去 30 天）

Abhishek Chakraborty 2021-3-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/782003-how-to-extract-the-first-four-and-last-four-digits-of-all-numbers-of-an-array-where-each-number-is-o

评论： Abhishek Chakraborty 2021-3-24

I have an array of over 200,000 numbers. Each of these numbers is of 12 digits. I want to extract and form another array with: (1) the first four digits of the original array, (2) the last four digits of the original array. How can it be done?

For example if one of the numbers of the array is 123456789012, then the output to (1) should be "1234" and output to (2) should be "9012".

2 个评论
显示无隐藏无

DGM 2021-3-24

Is this a strictly numeric array or a cell array of strings/chars imported from a file?

Abhishek Chakraborty 2021-3-24

It is a numeric array. All the elements in the array are numbers.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

DGM 2021-3-24

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/782003-how-to-extract-the-first-four-and-last-four-digits-of-all-numbers-of-an-array-where-each-number-is-o#answer_656603

编辑：DGM 2021-3-24

在 MATLAB Online 中打开

Try this

% this is my example data
num=[152012073637; ...
     325081863583; ...
     841721647389; ...
     648968298758; ...
     346301193257; ...
     595880316669];
 
numhead=floor(num/1E8)
numtail=mod(num,1E4)

the results are: