Sorry, could not understand at first reading in full. I went through your message again. What you said is correct. I am trying to measure "the slight change in F given a slight change in x... want a measure of sensitivity to change in each variable".
Thanks for your reply. Actually the definition of sensitivity states "how the variation in the output of a model can be attributed to different variations in the inputs of the model". I meant to use partial derivative symbol here therefore. Now if function F is only dependent on variable a, the...
1. Function, F is dependent on variable a; and the sensitivity is
S = \frac{\frac{\delta{F}}{F}}{\frac{\delta{a}}{a}}
2. My question is what if F is a function of two variable, a and b? In that case what would be the sensitivity equation? Is it something like:
S =...