How to use the SUM() function..?

7 次查看（过去 30 天）
paul
paul 2022-10-5
移动：Steven Lord 2022-10-5
Hello,
I must be doing something very stupid here, as I can't get the sum() function to work at all;
X = [0 0.5 1 1.5 2 2.5]
sum(X(1,:))
From what I've read, this should sum all the element of row 1 of the matrix X and return a numerical result, but when I try it, I get the error:
Array indices must be positive integers or logical values.
Can anybody tell me what I'm doing wrong, please?
Thanks,
Paul

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采纳的回答

Bruno Luong
Bruno Luong 2022-10-5
You overshadow sum function
make sure to run
clear sum
before runing your code
  2 个评论
paul
paul 2022-10-5
移动：Steven Lord 2022-10-5
...As is so often the way, I almost instantly found the problem after bashing my head against it and then posting my question...
I cleared all my workspace variables and suddenly sum(0 started working, so there must have been something in there which was stopping sum() from working...
Thanks to anybody who was thinking about this for me,
Paul
paul
paul 2022-10-5
移动：Steven Lord 2022-10-5
Thanks very much :)

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更多回答（1 个）

Torsten
Torsten 2022-10-5
Did you create a MATLAB function with name sum.m ? If yes, rename it.

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