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);
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).
can i get the answer?
Easy to solve. But how to reach better result???
good usage of ans
vecsum doesn't work in my 2018b software and I can't find vecsum in my documentation. Where is it?
y=sum(x) is not working
It's easy. A good problem to start for beginners!
this was fun and challenging
simple and sweet
not too difficult
I was originally confused by the assertion code but I understand now.
piece of cake!
really beginner friendly problem!
Solution CommentsShow comments
Problem Recent Solvers43308
Remove any row in which a NaN appears
More from this Author96
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!