Thank Jarle, very helpful.
Indeed using
f(x,y,z) \approx ax+by+cz+d
gave a poor correlation between the estimated and the measured readings. I tried:
f(x,y,z) \approx axyz+bxy+cxz+dyz+ex+fy+gz+h
and the correlation appears much better. I think I have some outliers in the...
I am an engineer student working in nuclear research. I am performing some experiments looking for an empirical equation to apply to results in a test section, but am having trouble making a mental leap. Here is the core of the problem with all of the engineering 'fat' trimmed off:
I have a...