Solve looping for big cell, vector, and summation

I have Z, Z is cell (1*1000) and for i=1:1000 size(Z{i}) is 1*1008

I need to do the summation until 1000, start from 1, i can do it manually but it will be long until 1000.

The code is like this,

p1=sum(reshape(Z{1},[],4),1) %Z{1} is 1*1008, from 1008 column reshape to 4 column
%4*column1
%5*column2
%6*column3
%7*column4
for i=1:4
    f=(i+3)*p1(i) % x*p(x)
    h(i)= f %size(1*4)
end
sum(h)

Repeat,

p2=sum(reshape(Z{2},[],4),1) 
%8*column1
%9*column2
%10*column3
%11*column4
for j=1:4
    f=(j+7)*p1(j) % x*p(x)
    h(j)= f %size(1*4)
end
sum(h)

How to create a looping until p1000?

Answer 1

[Matt J]

Z=repmat({rand(1,1008)}, 1,1000); whos Z  %Fake input data

  Name      Size                Bytes  Class    Attributes

  Z         1x1000            8168000  cell               

Z=reshape(cat(3,Z{:})  ,[],4,numel(Z));

p=sum(Z,1);

w=reshape(0:numel(p)-1,1,4,[]);

result = squeeze( sum( p.*w,2) ); whos result

  Name           Size            Bytes  Class     Attributes

  result      1000x1              8000  double              

[DoinK]

The last result is like this Sir,

w(:,:,63000) =

251996 251997 251998 251999

And pop out error message :

"Arrays have incompatible sizes for this operation.

Related documentation "

[Matt J]

Should be fixed now.