Can anyone tell me the error with sum function?

r=0.5;

n=0:10;

x=r.^n

s=sum(x)

What's the error with s?

[Adam]

No idea. You tell us! If you get an error message then post it here, if you don't then what kind of error are you talking about?

[Alex Mcaulley]

What is wrong? It is the summation of a geometric progression and the result seems ok:

%Your code
r=0.5;
n=0:10;
x=r.^n
s=sum(x)

%General formula
s2 = x(1) + r*(x(end)-1)/(r-1)

s =
    1.9990
s2 =
    1.9990

[Bandar]

The code is running just fine.

Answer 1

[Steven Lord]

Based on prior experience, I suspect you received the error "Array indices must be positive integers or logical values." If that's the case, clear the variable you've created named sum which is preventing you from calling the built-in sum function.