MATLAB Answers

replace specific commas using strrep

조회 수: 1(최근 30일)
Lukas Netzer
Lukas Netzer 2021년 8월 5일
댓글: Stephen 2021년 8월 6일
I converted my data:
'[[0, 145, 0], [145, 169, 1], [169, 1693, 3], [1693, 1708, 1], [1708, 2729, 3], [2729, 2779, 0]]'
using str2num.
Now I can use strrep to remove certain characters. I want to replace commas outside of the square brackets with semicolons and then remove all square brackets.
I know how to remove the brackets, but am not sure how to replace certain commas and leave the others. That's what I would use to remove the brackets:
b=strrep(data,']','');
b=strrep(data,'[','');
The final output should look like that:
'0, 145, 0; 145, 169, 1; 169, 1693, 3; 1693, 1708, 1; 1708, 2729, 3; 2729, 2779, 0'
Thank you for your help!

채택된 답변

Scott MacKenzie
Scott MacKenzie 2021년 8월 5일
편집: Scott MacKenzie 2021년 8월 5일
In stages, to show the possibilities...
s1 = '[[0, 145, 0], [145, 169, 1], [169, 1693, 3], [1693, 1708, 1], [1708, 2729, 3], [2729, 2779, 0]]'
s1 = '[[0, 145, 0], [145, 169, 1], [169, 1693, 3], [1693, 1708, 1], [1708, 2729, 3], [2729, 2779, 0]]'
s2 = strrep(s1, '],', '];')
s2 = '[[0, 145, 0]; [145, 169, 1]; [169, 1693, 3]; [1693, 1708, 1]; [1708, 2729, 3]; [2729, 2779, 0]]'
s3 = strrep(s2, ']', '')
s3 = '[[0, 145, 0; [145, 169, 1; [169, 1693, 3; [1693, 1708, 1; [1708, 2729, 3; [2729, 2779, 0'
s4 = strrep(s3, '[', '')
s4 = '0, 145, 0; 145, 169, 1; 169, 1693, 3; 1693, 1708, 1; 1708, 2729, 3; 2729, 2779, 0'
  댓글 수: 1
Lukas Netzer
Lukas Netzer 2021년 8월 5일
thank you! :)

댓글을 달려면 로그인하십시오.

추가 답변(1개)

Stephen
Stephen 2021년 8월 5일
편집: Stephen 2021년 8월 5일
"I converted my data... using str2num."
Although your descriptiion is unclear, I guess that your goal to convert text data into numeric data. In that case, don't waste time fiddling around with strings (or for that matter, using STR2NUM which hides evil EVAL inside):
S = '[[0, 145, 0], [145, 169, 1], [169, 1693, 3], [1693, 1708, 1], [1708, 2729, 3], [2729, 2779, 0]]';
M = sscanf(S(2:end),'[%f,%f,%f], ',[3,Inf]).'
M = 6×3
0 145 0 145 169 1 169 1693 3 1693 1708 1 1708 2729 3 2729 2779 0
Or
M = jsondecode(S)
M = 6×3
0 145 0 145 169 1 169 1693 3 1693 1708 1 1708 2729 3 2729 2779 0
  댓글 수: 2
Stephen
Stephen 2021년 8월 6일
@Lukas Netzer: was the data provided to you in a .mat file? If not, please upload the original data file.

댓글을 달려면 로그인하십시오.

Community Treasure Hunt

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

Start Hunting!

Translated by