Building a model
I have some questions on building predictive models.
First of all, if I know for sure that some of the future values I want to predict will be zero, how could I handle it?
Secondly, if I fulfill my dataset with many factors that affects my attributes, is there any way to give the % for every factor that affects the attribute?
Finally, I sometimes have as results negative values, but in reality I can't have negative values, only positive.
Is there any way to solve this problem?
Thanks in advance.