Hi, Can anyone tell me how to find average of three successive values in matlab, i have an array of 200 values

I have 200 values and need to find average of three successive values in complete array

[Image Analyst]

Which three?

Answer 1

[Azzi Abdelmalek]

x=rand(201,1);
m=mod(numel(x),3)
if m>0
x(end+1:end+3-m)=mean(x(end-m+1:end))
end
out=mean(reshape(x,3,[]))

Answer 2

[José-Luis]

your_vals = randi(100,1,200);
filterLength = 3;

%One option
your_result_1 = conv(your_vals,ones(1,filterLength)./filterLength);
your_result_1 = your_result_1(filterLength:end-filterLength+1); %Getting rid of the tails

%Alternatively
your_result_2 = filter(ones(1,filterLength)./filterLength,1,your_vals);
your_result_2(1:filterLength-1) = []; %Getting rid of the tails

 %One more still
 your_result_3 = arrayfun(@(x) mean( your_vals(x:x+filterLength-1) ),  1:numel(your_vals) - filterLength + 1); %one liner

%Rounding up
your_result_4 = mean(cell2mat(arrayfun(@(x) circshift(your_vals,[0 -x]),(0:filterLength-1)','uniformoutput',false)));
your_result_4 = your_result_4(1:end-filterLength+1); %Getting rid of the tails

Plus many others

[Image Analyst]

I hate it when people don't put enough information into their question so it causes us to have to guess at multiple possible meanings and come up with multiple possible solutions. By the way, with your conv() solution, there are boundary effect options of 'same' and 'valid' to handle "getting rid of tails" internally.

[José-Luis]

@Image Analyst: Didn't know that. Thanks. I guess I should follow my own advice and read the documentation sometimes.