Sum of array elements

[lucaspaiva96]

Hello good people

Why mathcad says that v isn't a vector?

[terryhendicott]

Hi,

"v" needs to be a column vector for the index to work.  To index into a row vector the index needs to be "0,i" or "1,i" depending how ORIGIN is set.

[terryhendicott · Accepted solution]

Hi

Sorry forgot to say you need to define i as well.

[lucaspaiva96]

That's it. Vectors are still matrices after all. To me it was natural write V(i) instead of V(0,i) , but I got it now. Maybe this can be a suggestion for future updates, just to clean up some notation.
Thanks for the help!

[Werner_E]

Not sure if you know that you don't need to fill the place holders for the sum if you want to sum up all elements. This will work for a column- and a row-vector alike.

If you really just want to sum a specific range of elements I would prefer the method Terry had already shown. Just for fun here are a few more you could use as well

[lucaspaiva96]

Thanks for the tips, it will be helpful!