Write for loop results in a matrix

2 views (last 30 days)
Danilo M
Danilo M on 19 Jul 2018
Commented: Danilo M on 19 Jul 2018
I have an A(:,2) matrix with some x-y coordinates, and B(:,2) matrix with a list of gauge stations coordinates. So, I want to find the nearest gauge station for each line of A. I could get to the code above, but I couldn't find a way to put this in a loop which write the nearest B point for each A line in 'nstation'
dist=bsxfun(@hypot,B(:,1)-A(1),B(:,2)-A(1));
nstation = B(dist==min(dist),:);
  2 Comments
Jan
Jan on 19 Jul 2018
Which Matlab version do you use?
Danilo M
Danilo M on 19 Jul 2018
I'm using R2015a version

Sign in to comment.

Answers (1)

Jan
Jan on 19 Jul 2018
X = B(:,1) - A(:,1).'; % >= R2016b ! Arithmetic expanding
Y = B(:,2) - A(:,2).';
dist2 = sum(X.^2 + Y.^2);
Now you can use this matrix to find the minimal distances. Use pdist for a more efficient calculation, which considers the symmetry.

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!