Find the sum of the vector using a for loop

I have been looking through the community for the awnser to this since it has been brought up so much, and it has helped me alot, but I'm missing something and dont know what keywords to use to find it.

I'm trying to sum the rows of my vector x but the current code does not seem to do this, I think it an error with n=50:1 but dont know what else todo.

Answer 1

[Tyde Hilderbrandt]

The awnser ended up being

Answer 2

[the cyclist]

If you type the expression

50:1

into MATLAB, you will get the result

>> 50:1

ans =

  1×0 empty double row vector

So, your for loop doesn't have any iterations.

You could try

for n = 1:50

instead.

Also, note that

sum(x(1:50))

will sum the first 50 elements of x, without a for loop, and

sum(x)

will sum all the elements of x.

Seems like you might benefit from a beginners tutorial in MATLAB. You might want to take a look at the MATLAB Onramp.

[Tyde Hilderbrandt]

I just finished the onramp. It was very helpful, but i guess not everything stuck. I tried 1:50 but it gives me the error

[the cyclist]

I hadn't noticed that x is a table, and not a simple numeric array. There are some solutions in this question about how to sum a column of a table.

[Tyde Hilderbrandt]

Thank you for the link, but I dont think this will work since it is a homework problem which requires the use of "for". I would ask my professor for help but with the current status of universitys, office hours are no long avalible until new scheduling is figured out and spring break is over, March 30. I am going to continue to try and solve it my self but the help is very much appriaciated.

[the cyclist]

OK. I think there are still some elements of those solutions you could use. For example, you could still use the table2array function to convert the table to a numeric array, and then use a for loop for the sum.

[Tyde Hilderbrandt]

Yes, I have saw that and added it to my code, defiently making progress. Here is what I have now. P.S changed z(n)=z+x to z(n)=n+x