How do I convert a column to numeric?
조회 수: 58 (최근 30일)
이전 댓글 표시
See the image
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/191048/image.png)
I want to count with the 1st column, but I always get the message "Undefined operator" - "for input arguments or type 'cell'." What can I do about it? I think the column is not numeric, but I am not sure. Who can help me?
채택된 답변
Stephen23
2018년 6월 6일
편집: Stephen23
2018년 6월 6일
Where C is your cell array:
V = str2double(C(:,1))
This assumes that there is no header, and that each cell of the first column contains one number stored as a char (using a dot, not comma).
댓글 수: 9
Stephen23
2018년 6월 6일
편집: Stephen23
2018년 6월 6일
- {} curly braces access the data inside the cells.
- () parentheses access the cells themselves.
Just think of cell arrays like boxes: do you want to pick up the box (the cell, ()), or whatever that is inside the box (the data, {}). Sometimes you want to pick up the box, and sometimes you want to get out whatever is inside... each of these can be useful.
Therefore to access the contents of one cell you just need to use curly braces:
alldata{1,1} - 10
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Matrices and Arrays에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!