All,
I am trying to eliminate the effects of age upon my analysis of growth vs
category. I have two categories and, for each, I would like to truncate the
top 20% and the bottom 20% of the data subset.
Two categories: A & B
Dependent var: growth
Independent var: measures of mixture
The number of elements in each category is not the same. Also, the
distribution of category A is not necessarily the same as the distribution of
category B; e.g., the bottom 20% of A, for example, would not necessarily be
the same age as the bottom 20% of B.
Does anyone have suggestions about the syntax for extracting or subsetting the
dataset to only look at the middle 60% of each category?
I couldn't find anything in the archives, but perhaps my search keywords were
not correct.
Thank you in advance.
Keith
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