MATLAB从字符串中读取所有数字 [英] MATLAB reading all numbers from a string

问题描述

我正试图从字符串中读取未知数量的数字值.

I'm trying to read an unknown number of numeric values from a string.

例如:

line = 'bla bal bli : 3 5 12 15 266'

我尝试了sscanf，但是它要求我提前知道字符串中有多少个数字.

I tried sscanf but it requires I know how many numbers are in the string ahead of time.

推荐答案

如果要从字符串中提取整数，则可以使用正则表达式:

If you want to extract integer numbers from the strings, you can use a regular expression:

1. 要获取数字作为字符串的单元格数组:

1. To get the numbers as a cell array of strings:

>> line = 'bla bal bli : 3 5 12 15 266';
>> regexp(line,'(?<!\d)(\d)+(?!\d)','match')
ans = 
    '3'    '5'    '12'    '15'    '266'

要获取数字作为数字矢量:

To get the numbers as a numeric vector:

>> str2double(regexp(line,'(?<!\d)(\d)+(?!\d)','match'))
ans =
     3     5    12    15   266

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