Problem 3. Find the sum of all the numbers of the input vector

If x is 3x3 (or 3x3x3) or similarly shaped vector, sum(x) doesn't automatically add up all of the numbers in the entire vector. You need a loop to go through each dimension of x to get the sum of every element.

James, a vector traditionally denotes a 1xd or dx1 matrix (with d > 1). If d = 1, we tend to call that a scalar.

Firstly you'd need to vectorize the elements as in suppose x is 3x3 or any size mxp, let y=x(:); now you can find the sum by employing the function sum,i.e,sum(y);

What is the size of vector....is it [1*n] or [n*m]

Well said, Rohan.

I'm only commenting for the badge

Why is the solution larger when I call it a single? Additionally, how can I make my solution:

' function y = vecsum(x)
y = sum(x);

end '

smaller?

solved it on first try

You don't need write x=[1 2 3 5]. He ask us write a function. So, it should be y=sum(x).

Easy

thank you

nice

yay

nice

very easy

yes

can i get the answer?

Easy to solve. But how to reach better result???

y=sum(x)

good

Great Problem!

good usage of ans

Nice one.

great problem

vecsum doesn't work in my 2018b software and I can't find vecsum in my documentation. Where is it?

y=sum(A)

y=sum(x) is not working

Easy!

It's easy. A good problem to start for beginners!

good

good question

this was fun and challenging

simple and sweet

good practice

Nice!!

nice practice

easy

nice

good practice

Very easy

not too difficult

I was originally confused by the assertion code but I understand now.

not bad

easy problem

pretty easy

piece of cake!

too ez