software

Dear all,

I am preparing a spreadsheet in order to perform some analysis (i.e.
OLS regressions). I use independent variables to explain one dependent
variable. I tried to construct the independent variables myself, but I
cannot figure out how to build them with worksheet functions. My
difficulties for two variables are attached as simplified examples and
illustrate the issue.

I would prefer solving these issues with worksheet functions, although
my several attempts get stuck at certain the points in both issues:

-In the 'similarity of previous purchases' (issue 2): how do I manage
to 1) observe the most frequent occurring code, 2) remember this code
and calculate the ratio with this code at any point in time?

-In the 'average time' (issue 2): when a F4-locked starting cell of a
moving average should be unlocked, given a certain criterium and
re-lock again at a new place in the spreadsheet.

I know, the spreadsheet is perhaps more clear....Thanx in advance for
all attempts! -------------------------------------------------------------------
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