MATLAB: Index exceeds array bounds error

Question

I have a list of numbers in an array and I need to sum them up based on a condition. The program needs to add numbers in particular position if and only if that number is greater than the previous number. The first number in the array is excluded For example, if the array is 4,5,3,7,9,6 the program will sum 5 + 7 + 9. Here is what I am trying to run, but it is not working.

list = input('Enter a list of positive intergers separated by commas:', 's');

value = strsplit(list, ','); value = str2double(value);

uppLim = length(value);

while value

    for i = 1:uppLim
        y = value(i);
        x = value(i+1);
        if y < x
            result = x;
        elseif y > x
            result = 0;
           templateStr = 'The sum of the numbers = %0.0f'; 
           toDisplay = fprintf(templateStr, result);
           disp(toDisplay); 
        end
    end
end

my error being returned is "index exceeds array bounds". What is going wrong?

Answer 1

uppLim = length(value) - 1;

Should solve your problem. Oh and drop the

while value

which is basically an endless loop because value doesn't change inside the loop. it's also not necessary because the

for i = 1:uppLim

doesn't enter the loop when value is empty.

I would also ditch the for loop, and vectorize it

list = input('Enter a list of positive intergers separated by commas:', 's');
value = strsplit(list, ','); value = str2double(value);
x = sum(value([false diff(value) > 0]));
disp(['The sum of the numbers = : ' num2str(x)]);