How do I make an average of points ?

Hi, say I have an 11*10 matrix and for every point in the 6th row, I want matlab to take an average of the surrounding points and make a new row; ie 1 point has 8 surrounding points then the same for each point in the row, how would this be done please ? Thanks

[jonas]

Please provide an example with input and desired output

[Ernest Adisi]

1 2 3 4 5 6 7 8 9 10

5 2 4 6 7 4 5 6 7 8

1 2 3 4 5 6 7 8 9 10

Eg. 2 on the second row would be (1+2+3+5+2+4+1+2+3)/9

Then 4 would be the same pattern

(2+3+4+2+4+6+2+3+4)/9. Etc

So a new row is formed with every point taken as the average of the immediate surrounding points

Answer 1

[jonas]

Based on your simple example:

A=[1 2 3 4 5 6 7 8 9 10;
   5 2 4 6 7 4 5 6 7 8;
   1 2 3 4 5 6 7 8 9 10]

out = conv2(A,ones(3,3)./9,'same')

This will give you the average of all 9 neighboring values. Second row:

out(2,:)

ans =

Columns 1 through 10

    1.4444    2.5556    3.3333    4.5556    5.2222    5.7778    6.3333    7.3333    8.3333    5.8889

Answer 2

[Yuvaraj Venkataswamy]

Check this,

if true
  X = rand(11,10);
  k = 6;
  MA = movmean(X,[(k-1) 0]);
  Y = MA(k:k:end,:);
end