This is NOT the weighted average. The denominator should be the sum of the weights. PLEASE FIX THIS!!!

Nice function!

This WAS the leading solution (not mine), but I removed the regexp function so you can see that it is a terrible solution.

Your weight vector should be a unit vector. W=w/norm(w) to get a true weighted average. Dividing by the max is dumb.

.

keep it up

Nice problem

easy

(^o^)v

This user (mohamed elbesealy) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV

This is a seriously flawed problem. I'm sorry, but it is. It uses an incorrect definition of a weighted average. As such, students might solve this problem, then try to use that same expression in code for some future job. A correct solution might better be:

y = x*w'/sum(w);

Agree the definition of "weighted average" is flawed. There's still a mistake in your line; it should be y = sum(x.*w)/sum(w), or y = dot(x,w)/sum(w).

That's good.

how the heck can you get smaller than?
y = x*w'/3

Sweet.

obviously misuse of poor testing...

Easy, but not the weighted average. Even assuming that the first vector contains the weighting factors (for example the sizes of different sample groups) and the second vector contains the means of the sample groups, than the divisor has to be the sum of the weighting factors instead of the number.

This is beautiful! Smart move!

This is not the weighted average

Good one

odd name

I think the problem is not well formulated: in a weighted average, your weights should add up to one

FP operations and isequal(), sometimes yield some bitter results

l doubt on this definition of the problem

This is not the Weighted average. One should divide by the sum of the weighs, not by the number of them.

This is not the weighted average.
The weighted average has the sum of w in the denominator

I submitted a correct code with correct outputs , yet it keeps returning that its wrong

i donno how to report that

input - Request user input, thus values for x and w were overwritten.

This probably shouldn't pass...

I like the commented "y =(x*w.')/length(x)" more than the "shorter" solution.