MATLAB Vector Size

element v1,v2,v3,…,vn the size of the vector v is given by the following formula-

| v | =√(v1 ² + v2 ² + v3 ² +...+ vn ²)

You need to take the following steps to calculate the size of the vector-

• Usearray multiplication(.*）to take the product of the vector with itself. This will produce a vector sv whose elements are the squares of the elements of the vector v.

  sv = v.* v;

• Use the sum function to obtainsumThe square of the elements of the vector v. This is also known as the dot product of the vector v.

  dp = sum(sv);

• UsesqrtThe function obtains the square root of the sum, which is also the size of the vector v.

  mag = sqrt(s);

Online Example

Use the following code to create a script file-

v = [1:　2:　20];
sv = v.*　v;  % vector with elements
　　　　　　　　　　　　　　　　　　% as the square of v elements
dp = sum(sv);  % sum of squares - dot product
mag = sqrt(dp);  % magnitude
disp('Magnitude:');　
disp(mag);

Magnitude:
36.469