How I can combine vectors in matrix

Hi, I have a problem. This is my program text.

for i=1:614
    if (x1(i,1) == 0)
        p=[1 0 0 0 0 0 0 0 0 0 0 0];
    elseif ((x1(i,1) > 0) && (x1(i,1) <= 10000))
         p=[0 1 0 0 0 0 0 0 0 0 0 0];
    elseif ((x1(i,1) > 10000) && (x1(i,1) <= 20000))
        p=[0 0 1 0 0 0 0 0 0 0 0 0];
    elseif ((x1(i,1) > 20000) && (x1(i,1) <= 30000))
         p=[0 0 0 1 0 0 0 0 0 0 0 0];
    elseif ((x1(i,1) > 30000) && (x1(i,1) <= 40000))
         p=[0 0 0 0 1 0 0 0 0 0 0 0];
    elseif ((x1(i,1) > 40000) && (x1(i,1) <= 50000))
         p=[0 0 0 0 0 1 0 0 0 0 0 0];
    elseif ((x1(i,1) > 50000) && (x1(i,1) <= 60000))
         p=[0 0 0 0 0 0 1 0 0 0 0 0];
    elseif ((x1(i,1) > 60000) && (x1(i,1) <= 70000))
         p=[0 0 0 0 0 0 0 1 0 0 0 0];
    elseif ((x1(i,1) > 70000) && (x1(i,1) <= 80000))
         p=[0 0 0 0 0 0 0 0 1 0 0 0];
    elseif ((x1(i,1) > 80000) && (x1(i,1) <= 90000))
         p=[0 0 0 0 0 0 0 0 0 1 0 0];
    elseif ((x1(i,1) > 90000) && (x1(i,1) <= 100000))
         p=[0 0 0 0 0 0 0 0 0 0 1 0];
    elseif (x1(i,1) > 100000)
         p=[0 0 0 0 0 0 0 0 0 0 0 1];
    else
    end
    D=p*P
end

x1 is [614x1] vector.

P is [12x12] matrix.

So with this program my answer is vector D, given 614 times (because x1 have 614 elements). But I need that those vectors would be combine into [614x12] one matrix.

How can I do that? it very urgent.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[James Tursa]

Assuming none of the x1 values are negative, which from the looks of your code seems to be an assumption you made.

D = zeros(614,12);
for i=1:614
    :
    D(i,:) = p * P;

But it looks like you are simply picking off rows of P depending on the value of x1. This could be vectorized. E.g.,

x = ceil(x1/10000) + 1;
x(x>12) = 12;
D = P(x,:);

[Akvile Dumbliauskaite]

Thank you so much :) I get the matrix. But there is a little problem, I get that matrix 614 times :) I need that matrix just one time.

[James Tursa]

Did you replace the D=p*P line with D(i,:)=p*P? And put a semi-colon at the end of the line to suppress the screen output?

[Akvile Dumbliauskaite]

Oh sorry, it gives a good answer :) Thank you :)