How to show my output from matrix?
2 次查看(过去 30 天)
显示 更早的评论
Hi everyone, i have
c= 1 1 1; 2 4 8; 3 9 27; 4 16 64
I extracted each row by c(1,:), c(2,:), c(3,:) and c(4,:). I want to find which row of the greatest common divisor (gcd) value with 5 is equal to 1 for each of the elements in the row vector.
ind=find(gcd(c(1,:),5)==1)
The answer gives me 1 2 3 if this command is used. I want the output is 1 as I am only interested in which row gives me all gcd value is 1.
How can i do this?
Thanks.
0 个评论
采纳的回答
David Sanchez
2014-5-7
For all your rows:
gcd(c(k,:),5) = [1 1 1];
Then,
find(gcd(c(3,:),5)==1) = [1 2 3]
since all the elements in the first operation equal 1 (for all rows)
You want to the first element fulfilling the condition:
ind=find(gcd(c(3,:),5)==1,1)
ind =
1
2 个评论
David Sanchez
2014-5-7
more clear now. The [1 2 3] you get from your commands correspond to the elements within each row and not to the rows of C, which is what you want.
You can do something like this though:
c= [1 1 1; 2 5 8; 3 9 27; 4 16 64];
N = size(c,1);
idx = zeros(N,1);
for k=1:N
v = all(gcd(c(k,:),5) == 1); % v = 1 if all the elements of row == 1
if v
idx(k) = k;
end
end
idx will contain the rows that fulfil your condition
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!