mean first 10 lines and next 10 line till finish array

i got 210338x3 table array. how to calculate mean for 10 line, then next 10 line, then next 10 line till finish my table array. i dont know how to group first 10th, next 10 and next 10.

thanks!

Answer 1

[Mathieu NOE]

hello

try this

%% dummy data
data = rand(210338,3); % data must be column oriented (number of rows = number of samples)
buffer = 10;    % nb of samples for averaging 


%% zero overlap averaging (unweighted)
[m,n] = size(data);

for ci=1:fix(m/buffer)
    start_index = 1+(ci-1)*buffer;
    stop_index = min(start_index+ buffer-1,m);
    avg_data(ci,:) =mean(data(start_index:stop_index,:));  % size : 1 x 3 
end

[Siti Safwana Abd Razak]

hi Mathieu,

thanks!

[Mathieu NOE]

My pleasure !

Answer 2

[Chunru]

a = rand(210338, 3);
nrows = size(a, 1)

nrows = 210338

n = 10;
nseg = floor(nrows/n)

nseg = 21033

c = squeeze(mean(reshape(a(1:n*nseg,:), n, nseg, 3)));
clast = mean(a((n*nseg+1):end,:));         % last part
whos

  Name            Size              Bytes  Class     Attributes

  a          210338x3             5048112  double              
  c           21033x3              504792  double              
  clast           1x3                  24  double              
  n               1x1                   8  double              
  nrows           1x1                   8  double              
  nseg            1x1                   8  double              

[Siti Safwana Abd Razak]

thanks you so much!!!