convert a 10x2 matrix into x,y coordinates

21 ビュー (過去 30 日間)
Supriya Gain
Supriya Gain 2019 年 8 月 7 日
コメント済み: Stephen23 2022 年 12 月 14 日
I have a 10X2 matrix. Now i want to convert this into x,y co-ordinate. like (x,y)=[(1,1), (1,2)]. How to do that?
  3 件のコメント
KALYAN ACHARJYA
KALYAN ACHARJYA 2019 年 8 月 7 日
@Madhan as per my undestanding, may be this one
mat_cor{i,j}=[i,j]; % The loop creates it
A structure with [1,1], [1,2]..... same size as matrix size. I have no clue, WHY?
Supriya Gain
Supriya Gain 2019 年 8 月 7 日
Suppse i have a 3X2 matrix [1 2;3 4;5 6]
Now i want the answer as (x1,y1)=(1,2)
(x2,y2)=(3,4)
(x3,y3)=(5,6)

サインインしてコメントする。

採用された回答

Stephen23
Stephen23 2019 年 8 月 7 日
>> M = [1,2;3,4;5,6]
M =
1 2
3 4
5 6
>> V = 1:size(M,1);
>> fprintf('(x%d,y%d)=(%d,%d)\n',[V;V;M.'])
(x1,y1)=(1,2)
(x2,y2)=(3,4)
(x3,y3)=(5,6)
  2 件のコメント
Sirvan Ahmadi
Sirvan Ahmadi 2022 年 12 月 14 日
What if we only want to have,
(1,2)
(3,4)
(5,6)
Stephen23
Stephen23 2022 年 12 月 14 日
"What if we only want to have"
M = [1,2;3,4;5,6]
M = 3×2
1 2 3 4 5 6
fprintf('(%d,%d)\n',M.')
(1,2) (3,4) (5,6)

サインインしてコメントする。

その他の回答 (1 件)

Steven Lord
Steven Lord 2019 年 8 月 7 日
If you are trying to create twenty individual variables, one for each element of your 10-by-2 matrix, DON'T DO THAT. See this Answers post for a lengthy discussion of why this is strongly discouraged.
In my opinion, turning that one variable into two (to make it easier to refer to the X and Y coordinates separately) seems reasonable.
A = [1 2;3 4;5 6];
x = A(:, 1);
y = A(:, 2);
With this approach, what you called x2 would instead be x(2). Or you could use the whole vector at once.
plot(x, y) % Shorter than but equivalent to
plot(A(:, 1), A(:, 2))
But the proliferation of variables from one to twenty-one (the twenty new ones plus the original one) is just going to clutter your workspace. Consider: if you had a 10000-by-2 matrix instead of a 10-by-2, do you want to search through twenty thousand variables in your workspace to access the piece of data you need?

カテゴリ

Help Center および File ExchangeCreating and Concatenating Matrices 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!

Translated by