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survey
2008 Jan 24
3
Reshaping a dataframe with conditional summary of columns - apply or reshape?
...perations/conditions that I need are:
(A) The observations in "count" for each survey at each location in a given
year need to be reduced according to the following rules and then placed in
new columns "survey1", "survey2", "survey3" :
-- when count = 0, surveyX = 0
-- when 0 < count < 11, surveyX = 1
-- when 11 < count, surveyX = 2
(B) The observations in var1 need to be summarized (here, by taking the
mean) across all surveys for a given location in a given year and placed in
"var1summ"
(C) Observations in var2 need to be summa...