Hi,
I'm trying to compute a moving average of length 20. I've got a vector of structs that's read into my function and I'm using an iterator to read through as follows:
int length = a;
int count = 0;
double sum = 0;
while (itr!= priceinput.end())
{
sum += itr->Close;
count ++;
if (count >= length)
{
itr->MovingAve = (sum / (double) length);
sum -= (itr-length)->Close; // this is the problem line
}
So I'm trying to find out what the right syntax is for the sum-= line. When count gets to 21, I have to subtract the 1st number from the sum, so that's (count-length). I've been googling for the right syntax to do this with the iterator, in this case, itr, but no luck so far.
Any ideas?
Thanks,
TR