Refer to elements in a matrix
10 ビュー (過去 30 日間)
古いコメントを表示
I have a 16 x 16 matrix defined and I need to pick the elements from this matrix based on some other numeric data that I will be processing. Eg: if the data is 26, I need to pick the element in row 2 column 6. Can someone please suggest a code for this?
Thanks in advance.
0 件のコメント
採用された回答
Star Strider
2017 年 1 月 30 日
編集済み: Star Strider
2017 年 1 月 30 日
My approach:
A = randi(99, 16); % Create Matrix
data = 26;
row = fix(data/10)
col = rem(data,10)
Desired_Element = A(row,col)
EDIT — I have no idea how you would format references to elements (5,10), (10,5) or (16,16) since you did not give an example of those. My code here works for the problem you posted (single-digit subscripts), but would have to be revised to generalise to those other conditions, depending on how you format your ‘data’ reference.
5 件のコメント
Star Strider
2017 年 2 月 1 日
I don’t have any experience with encryption. I may not be able to provide you further help.
How would you generalise your table lookup to pixels with a value of 206, 236, or something similar? Obviously, considering only the first and last digits in a pixel value would not provide a unique map to your table in this instance.
その他の回答 (1 件)
Honglei Chen
2017 年 1 月 30 日
You may want to look at ind2sub function, but do you mean data = 22? I couldn't see how the 2nd row 6th column maps to element 26.
HTH
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Logical についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!