Hey in your code you are adding a row in weight every time the loop runs, instead of this while initializing weight give total number of rows like this weight = zeros(Total,4).
tic;
final=10;
Range=[1:0.1:final];
Total = length(Range)^4
weight=zeros(Total,4);
cont=0;
for weight1=Range
for weight2=Range
for weight3=Range
for weight4=Range
if abs(weight1-0) > 1e-8
cont=cont+1;
weight(cont,:)=[weight1 weight2 weight3 weight4];
end
end
end
end
end
toc;
