Use equation in for loop
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I have a 2d array that I'm reading in that is 100x2. I have the following equation that needs to loop through and calculate starting at the next row
total=total+(y1+y2)*(x1-x2)
Here's what I've started with, I'm just not sure how to set it up
[nrows,ncols] = size(data);
for m=1:1:nrows
for n=1:1:ncols
total = total+
2 个评论
Walter Roberson
2016-5-4
What are x1, x2, y1, y2? How do they relate to the content of the image? How do they relate to the row or column numbers?
采纳的回答
MHN
2016-5-4
data = rand(100,2); % just for an example
[nrows,ncols] = size(data);
total = 0;
for m=1:nrows-1
total = total+ (data(m,2)+data(m+1,2))*(data(m,1)+data(m+1,1));
end
更多回答（2 个）
CS Researcher
2016-5-4
编辑：CS Researcher
2016-5-4
You can avoid the for loop by:
data = rand(100,2); % just for an example
N = size(data,1);
total = sum((data(1:N-1,2) + data(2:N,2)) .* (data(1:N-1,1) + data(2:N,1)));
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