Hi,
As per my understanding, you want to calculate the mean values of a column by considering 2 entries at a time.
To calculate the mean of every two values in each column of a matrix in MATLAB, you can reshape the matrix and then compute the mean along the desired dimension.
Kindly look at the code below to understand how to calculate mean of ever two values in a matrix:
% Define the matrix A
A = [1, 2, 3; 4, 6, 8; 7, 12, 7; 14, 4, 23];
% Number of rows to average over
blockSize = 2;
% Check if the number of rows is divisible by blockSize
if mod(size(A, 1), blockSize) ~= 0
error('The number of rows in A must be divisible by %d', blockSize);
end
% Reshape and compute the mean
result = mean(reshape(A, blockSize, [], size(A, 2)), 1);
% Remove the singleton dimension
result = squeeze(result);
% Display the result
disp(result);
There is one more alternate way using for loops which can be more intuitive.
Please refer to the code below:
% Define the matrix A
A = [1, 2, 3; 4, 6, 8; 7, 12, 7; 14, 4, 23];
% Number of rows to average over
blockSize = 2;
% Preallocate the result matrix
numBlocks = size(A, 1) / blockSize;
result = zeros(numBlocks, size(A, 2));
% Compute the mean for each block
for col = 1:size(A, 2)
for block = 1:numBlocks
% Calculate start and end indices for the block
startIdx = (block - 1) * blockSize + 1;
endIdx = block * blockSize;
% Compute the mean for the current block in the current column
result(block, col) = mean(A(startIdx:endIdx, col));
end
end
% Display the result
disp(result);
Here is a link for documentation of “mean” function used in the code above: https://www.mathworks.com/help/matlab/ref/mean.html
I hope it will help!
