Don't know how to Loop

Hi.

I don't know how to solve this. I have this code

 for i= 1:19
    [x(i),y(i),z(i)] = multilaterasi(Reader(1, 1), Reader(1, 2), Reader(1, 3), Distance(1,i), Reader(2, 1), Reader(2, 2), Reader(2, 3), Distance(2,i), Reader(3, 1), Reader(3, 2), Reader(3, 3), Distance(3,i), Reader(4, 1), Reader(4, 2), Reader(4, 3), Distance(4,i));
 end

I want to calculate the MSE from that code below with this formula.

MSE = sqrt((x(i)-xa)^2+(y(i)-1)^2+(z(i)-1.5)^2)

x(i), y(i), and z(i) should looping with for 1:19. But xa should looping with step 2 (the result should be 2,4,6,8,10,12 until 38). For example:

MSE = sqrt((x(1)-2)^2+(y(1)-1)^2+(z(1)-1.5)^2)
MSE = sqrt((x(2)-4)^2+(y(2)-1)^2+(z(2)-1.5)^2)
MSE = sqrt((x(3)-6)^2+(y(3)-1)^2+(z(3)-1.5)^2)

and the same for the rest until x(19), y(19), z(19) and xa=38

Please help. Thank you

Answer 1

[Star Strider]

In your code, ‘x’, ‘y’, and ‘z’ are vectors. You do not need a loop, since MATLAB uses vectorised operations and will do this automatically.

This works:

MSE = sqrt((x-xa).^2+(y-1).^2+(z-1.5).^2);

Here, since the argument vectors are row vectors, ‘MSE’ will be a row vector the same size as the argument vectors.

[Aulia Pramesthita]

oh right thank you

[Star Strider]

My pleasure.