HP 40g - Statistics Question 2

What should I do If I wish to generate a new column in C3 with C3 = ln(C2 / C1) as shown below? I couldn't find a way to generate the formula.

C1: 0.10 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
C2: 56 84 84 58 42 22 10 5 3
C3: empty

Answer:  There are two answers. 

The first is simply to define one of the scatter plots (say, S1), sothat the independent column is whatever you want it to be (some Cn) andthe dependent column has the formula Ln(C2/C1).  With the HP 39/40gs,you do not need to create a new column at all - it is unique in thatregard.  The data is the data; the definition of the scatter plot(S1,S2, etc) contains your hypotheses. 

Of course, you can always go to the home screen and enter "Ln(C2/C1) STO> C3". Personally, I prefer to keep the data pristine, so I know the columns are actual data, and use the scatter plot definitions to instantiate my hypotheses.