Character string to numeric vector

3 次查看（过去 30 天）
Roderick
Roderick 2024-9-20
编辑： Stephen23 2024-9-20
Dear all
I am extracting from a file in a for loop information in the following form: ' ( 0.0357 -0.0001 0.0051) ', which is a 1x27 char. I would like to store the three displayed numbers in a the three components of an array so I can use these figures to do mathematical operations. How could I transform them to do so in this case, keeping the minus signs that can appear for different steps of the for loop too?
  1 个评论
Stephen23
Stephen23 2024-9-20
@Richard Wood: please upload an unaltered sample data file by clicking the paperclip button.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Stephen23
Stephen23 2024-9-20
编辑：Stephen23 2024-9-20
Ran in:
txt = ' ( 0.0357 -0.0001 0.0051) '
txt = ' ( 0.0357 -0.0001 0.0051) '
vec = sscanf(txt(3:end),'%f',[1,3])
vec = 1×3
0.0357 -0.0001 0.0051
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
or
vec = sscanf(strtrim(txt),'(%f%f%f',[1,3])
vec = 1×3
0.0357 -0.0001 0.0051
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
Sameer
Sameer 2024-9-20
Hi Richard,
To extract the numbers from the string and store them in an array, you can use the "sscanf" function
Here's how you can do it:
% Example string
str = ' ( 0.0357 -0.0001 0.0051) ';
% Use sscanf to extract the numbers
numbers = sscanf(str, ' ( %f %f %f) ');
disp(numbers);
Please refer to the below MathWorks documentation link:
https://www.mathworks.com/help/matlab/ref/string.sscanf.html
Hope this helps!

类别

在 Help Center 和 File Exchange 中查找有关 Characters and Strings 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by