Formula result won't return a vector as exepected

Hello,

In a simple home exercise we were given a formula which needs to be executed in two different scenarios.

1. In the first scenario, our L is a vector.

R = 22;
L = [100:20:300]
N=1;
X = (L*N)/(R+N)

X returns a vector with the correct numbers.

2. In the second scenario, I was meant to create N as a vector with the command N = [1:3:45].

R=22
L = 300
N = [1:3:45]
X = (L*N)/(R+N)

Now X only returns one single value, 161.9772, which I am not even sure where did it come from. So, please advise me what's wrong with my code.

Answer 1

[Walter Roberson]

X = (L*N) ./ (R+N)

Answer 2

[aviv kadair]

LOL I actually figured it out the minute I sent this question. So, when do I use the colon sign before an operator? why didn't the first scenario required it?

Thanks

[Walter Roberson]

Your original code has a vector / a scalar. The operation of the / operator happens to be the same as the ./ operator when the denominator is a scalar.

Your second version of the code has a vector in the denominator. The / operator is different from the ./ operator when the denominator is not a scalar.

[aviv kadair]

Thank you for your answer, now I understand it clearly.