MATLAB: For loop

for loop

i have a=2×10 i need to use second row element how can i do it

i=1:length(a) i get elements of first row then how abt second row

please help me

Best Answer

a(1,:)  %first row
a(2,:)  %second row

Related Solutions

MATLAB: How to make this nested for loop work

your variable bc has no index, it can not change along the loop. temp1 and temp2 always take the value of bc(1) and bc(2) respectively for all i

MATLAB: How to replace NaN by comparable values of other variables

I guess, the problem occurs, when several matching values are found by:

t=find(dist_from_current_point==nearest_dist);

Maybe it satisfies your need to choose 1 only:

for j = 1:size(matrix_num, 1)
   if isnan(matrix_num(j, 1))
      % Vectorized instead of a loop:
      dist_from_current_point = (matrix_num(j, 2) - matrix_num(:, 2)) .^ 2;
      dist_from_current_point(j) = Inf;  % Safer than a magic limit of 1000    
        % Find nearest value and its index at once:
        [nearest_dist, t] = min(dist_from_current_point);
        % Then you do not have to find the index afterwards. But if you do,
        % choose *1* index only:
        % t = find(dist_from_current_point == nearest_dist, 1);
        matrix_num(j,1)=matrix_num(t,1);
     end
  end

If matrix_num is large and has a few NaN values only, this is more efficient:

index = find(isnan(matrix_num(:, 1));
for k = index(:).'   % Be sure it is a row vector
  dist     = abs(matrix_num(j, 2) - matrix_num(:, 2));
  [~, ind] = min(dist);
  matrix_num(k,1) = matrix_num(ind, 1);
end

Best Answer

Related Solutions

MATLAB: How to make this nested for loop work

MATLAB: How to replace NaN by comparable values of other variables

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