Error using ^ Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'. Error in Untitled (line 23) D(i) = sqrt ((a1(i)-a9)^2 +(b1(i)-b9)^2 + (c

Hi everyone, can you help me overcome this problem?

[Stephen23]

Notes about your code:

• Those square brackets do nothing. Get rid of them.
• A loop is not required, you can trivially vectorize the distance calculation.
• You need to learn about the differences between array and matrix operations. When you read the error message it already gives advice to pay attention to this.

Answer 1

[Stephen23]

Using my trusty magical crystal ball:

a1 = 550;
b1 = 355; 
c1 = 0.5676;
d1 = 1.3090;

a9 = Data(:,1);
b9 = Data(:,2);
c9 = Data(:,3);
d9 = Data(:,4);

D = sqrt((a1-a9).^2 + (b1-b9).^2 + (c1-c9).^2 + (d1-d9).^2)