Matrix construction over a loop

x=[1:1:10];
a=2;
b=4;
c=6;
for i=1:length(x)
A=a*b/x(i);
B=c+A(i)/b;
D=a+b;
E=1-2*c;
MAT=[B(i);D;E];
M=sqrt([MAT])
end

I am not able to matrix corresponding to 10 values of x.

plz help

thanks

[David Fletcher]

This line will create a scaler value for A

A=a*b/x(i);

On the following line you are trying to index a scaler value

B=c+A(i)/b;

Answer 1

[VBBV]

clear
x=[1:1:10];
a=2;
b=4;
c=6;
for i=1:length(x)
A(i)=a*b/x(i);
B(i)=c+A(i)/b;
D=a+b;
E=1-2*c;
MAT(i,:)=[B(i);D;E];
end
M=sqrt(abs(MAT))

[VBBV]

In my solution, the Matrix MAT is not 3 x 1. It is 10 x 3 for which sqrt is possible and same as what you would get if you perform MAT.^(1/2) element wise operation.

[ASHA RANI]

VBBV, thanks

Its works .

Answer 2

[Jan]

Maybe you want:

for i = 1:length(x)
  A(i) = a * b / x(i);
  B(i) = c + A(i) / b;
  D(i) = a + b;
  E(i) = 1 - 2 * c;
  ...