Trouble with Implementing Moving Average Filter in MATLAB

I am encountering difficulties while trying to implement a moving average filter in MATLAB. I have a code snippet that I believe should work, but I am getting unexpected results. Here is the code snippet that I have tried: %Input data inputData = [1, 2, 3, 4, 5, 6, 7, 8, 9]; windowSize = 3; % Moving average filter implementation filteredData = zeros(size(inputData)); for i = 1:length(inputData) startIndex = max(1, i - windowSize); endIndex = min(length(inputData), i + windowSize); filteredData(i) = mean(inputData(startIndex:endIndex)); end

Answer 1

[Chunru]

%Input data 
inputData = [1, 2, 3, 4, 5, 6, 7, 8, 9]; 
windowSize = 3; 

% use matlab function
filteredData = movmean(inputData, windowSize)

filteredData = 1×9

1.5000 2.0000 3.0000 4.0000 5.0000 6.0000 7.0000 8.0000 8.5000

% Moving average filter implementation 
wS = floor((windowSize-1)/2);
filteredData = zeros(size(inputData)); 
for i = 1:length(inputData) 
    startIndex = max(1, i - wS); 
    endIndex = min(length(inputData), i + wS); 
    filteredData(i) = mean(inputData(startIndex:endIndex)); 
end
filteredData

filteredData = 1×9

1.5000 2.0000 3.0000 4.0000 5.0000 6.0000 7.0000 8.0000 8.5000

Answer 2

[Harshavardhan Putta]

I understand that you're encountering difficulties while implementing a moving average filter in MATLAB. You can use the movmean function in MATLAB to implement a moving average filter. The movmean function calculates the moving average of a given data sequence using a specified window size.

% Input data
inputData = [1, 2, 3, 4, 5, 6, 7, 8, 9];
windowSize = 3;

% Moving average filter implementation using movmean
filteredData = movmean(inputData, windowSize);

disp(filteredData);

Please refer to the following documentation for more information.

https://in.mathworks.com/help/matlab/ref/movmean.html

I hope it helps!