Help with resolving out of memory

I have a function generatin a value (Vehicle) and ID numbers (VID) for vehicles.

function[Vehicle,VID]=race(ID, HHPerson,nBEV,BEV,x,i2)
for j = 1:nBEV
    if HHPerson(i2)>=x
        for k=1:nBEV
            %There is only one car if
            if k==j
                Vehicle{j,k}=BEV(:, j);
                VID{j,k}=ID(j);
                
            else
                Vehicle{j,k}=BEV(:, j)+BEV(:, k);
                VID{j,k}=[ID(j) ID(k)];
            end
        end
    end
    if HHPerson(i2)<x
        for k22=1:nBEV
            %There is only one car if
            Vehicle{j, k22} = BEV(:,k22);
            VID{j, k22}= ID(k22);
        end
    end
end
end

The size of the cells are 108x108, In Vehicle, every cell contains a 525600x1 double and in VID, every cell contains one ore two numbers.

This is the error message:

Out of memory. Type HELP MEMORY for your options.

Error in race (line 11)
                Vehicle{j,k}=BEV(:, j)+BEV(:, k);

Error in H2 (line 25)
    [Vehicle1, VID1]=race(ID,HHPerson,nBEV,BEV,x,C);

Error in A1337 (line 212)
            [GUD,GUDID]=H2(ID2,HHPerson,nBEV,BEV,x,Hcombos,Household,sample,A);
            
            

The initial size of the cells was 429x429, so I've already tried reducing the nr of vehicles included. Is there any way to circumvent the memory limit? The size of the cells is already preallocated as well and my memory is 64 GB

Answer 1

[Walter Roberson]

You should be preallocating the cell array Vehicle and VID as cell(nBEV,nBev}

The size of the cells are 108x108, In Vehicle, every cell contains a 525600x1 double

bytes_needed = 108 * 108 * 525600 * 8

bytes_needed = 4.9045e+10

gigabytes_needed = bytes_needed / 2^30

gigabytes_needed = 45.6765

You have problems unless you have more than 46 gigabytes.

[Joel Schelander]

I have 64 GB of memory.

[Joel Schelander]

My function H2, generates Vehicle1 and Vehicle2 of this size. Are they taking up 91 GB then?

[Vehicle1, VID1]=race(ID,HHPerson,nBEV,BEV,x,C);

[Vehicle2, VID2]=race(ID,HHPerson,nBEV,BEV,x,C);

[Walter Roberson]

Probably yes, 91+ gigabytes for two such arrays.