First, setting up the variable as you have it:
Blank2 = zeros(23,2);
Blank2(:,1) = 1:23;
Blank2(3,2) = 1;
Blank2(4,2) = 8;
Blank2(6,2) = 1;
Blank2(23,2) = 1;
display(Blank2);
One way is to use arrayfun() to operate on the elements of each column:
x = arrayfun(@(x,y)x*ones(1,y),Blank2(:,1),Blank2(:,2),'UniformOutput',false);
x = [x{:}];
display(x);
Another equivalent way using a for loop:
x = [];
for i = 1:size(Blank2,1)
x = [x Blank2(i,1)*ones(1,Blank2(i,2))];
end
display(x);
