Need Help Coding a Gaussian Problem

Hi, I am currently trying to code the following gaussian equation:

and my code is seen as below:

But my graphs just don't seem to come out right. The output that I get is this

but the actual output should look like the graph below

I cannot see where I am going wrong. Any help would be greatly appreciated!

Answer 1

[Doddy Kastanya]

You might not be using the correct data for this. For example, in your implementation x_i and x_j are simply numbers. Shouldn't they actually be vectors? Otherwise, there is no need to use the "norm" function.