How to sum only the positive elements in a vector using an If-Statement?

How do you only sum the positive elements in a vector using an if statement?

[Geoff Hayes]

Jason - what have you tried so far?

[Jason]

function result = sumPositive(vector)
%-------------------------------------------------

result = 0;
for k = 1:1:length(vector)
    if (vector(k) >= 0)
        result = result + sum(vector(k));
    end
end

and the test program is

clear;
clc;
close all;

% Test 1 for sum of only postive integers
vector = [10, -5, 0, 12, 14];
result = sumPositive(vector);
disp('The sum of the positive elements is: ')
disp(result)

What I'm not sure of is I need to put a statement to skip the negative numbers or how would I deal with those?

[Geoff Hayes]

Jason - your code above looks good. The statement if (vector(k) >= 0) will ensure that you only add positive numbers to your result local variable.

Note that in your line

 result = result + sum(vector(k));

you don't need the sum function, since vector(k) is a single element. The above can be replaced with just

 result = result + vector(k);

Note also, that the default step size, for loops, is 1. So the

 for k = 1:1:length(vector)

can be replaced with

 for k = 1:length(vector)

Answer 1

[Mohammad Abouali]

You can do that without if

let's say d is your array of positive and negative numbers. You want to sum only the positive ones then just do this:

sum(d(d>0))

[Jason]

thanks!!

[Camilo Malagon-Nieto]

beautifully simple!

[Amanda]

Hello, I think you are very beutiful. Are you married yet? (; (im over 18!)