[R] help with grouping data and calculating the means

sasa kosanic @@@@@ko@@nic @ending from gm@il@com
Thu Nov 15 17:48:37 CET 2018


Dear All,

I would very much appreciate the help with following:
I need to calculate the mean of  different lat/long points that should be
grouped.
However I would like that r excludes taking  values that are different in
only last decimal.
So instead 4 values in the group it would calculate the mean for only 3(
excluding the ones that differs in only one decimal).
# construct the dataframe
`TK-QUADRANT` <- c(9161,9162,9163,9164,10152,10154,10161,10163)
LAT <- c(55.07496,55.07496,55.02495,55.02496
,54.97496,54.92495,54.97496,54.92496)
LON <-
c(8.37477,8.458109,8.37477,8.45811,8.291435,8.291437,8.374774,8.374774)
df <- data.frame(`TK-QUADRANT`=`TK-QUADRANT`,LAT=LAT,LON=LON)


I would like to group the data and calculate means by group but in a way to
exclude every number that differs in only last decimal.


Also please see pdf. example-attached .

Many thanks!
Best wishes,
Sasha

-- 

Dr Sasha Kosanic
Ecology Lab (Biology Department)
Room M644
University of Konstanz
Universitätsstraße 10
D-78464 Konstanz
Phone: +49 7531 883321 & +49 (0)175 9172503

http://cms.uni-konstanz.de/vkleunen/
https://tinyurl.com/y8u5wyoj
https://tinyurl.com/cgec6tu

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