MATLAB: Biased smoothing moving average

MATLABmoving averageSignal Processing Toolboxsmoothing

I have measured strain data (in micron strain) from a 3rd party:

Column vector data: 10, 27, 46, 70, 127, 188, 254, 318, 437, 547, 628, 691, 740, 773, 795, 810

Then the 3-party "smoothes" the data with what they described as a moving average, biased to the first value. The data for the smoothed measured data is as follows:

Column vector: 12, 28, 47, 71, 128, 189, 254, 317, 435, 540, 624, 688, 736, 770, 793

I want to understand what function can be found for this smoothing as I would like to investigate its use for further measurements.

Any assistance would be welcome.

Best Answer

Try conv() or movmean().

Related Solutions

MATLAB: How to add zero at the very beginning of the column matrix

Use a semicolon instead of a comma. The variable 'Eng_Strain' is a column vector so you need to vertically concatenate the zero with the vector.

Eng_Stress = [zeros(1); Eng_Stress];    
%                     ^

Or just

Eng_Stress = [0; Eng_Stress];

MATLAB: Making Different Length Vector Same Length

One approach:

strainNew = interp1((1:numel(strain)), strain, linspace(1, numel(strain), numel(stress)), 'linear')';
figure
plot((1:numel(strain)), strain)
hold on
plot(linspace(1, numel(strain), numel(stress)), strainNew)
hold off

It creates a 12-element vector with the same beginning and ending values as the original vector to do the interpolation.

EDIT — Added transpose operator (') to create (12 x 1) vector,, added plot. Original code otherwise unchanged.

Best Answer

Related Solutions

MATLAB: How to add zero at the very beginning of the column matrix

MATLAB: Making Different Length Vector Same Length

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