[R] Average of a variable against another.
Keeeeeeee
finetreepf at gmail.com
Fri Feb 12 01:32:09 CET 2010
Dear helpers,
FYI, I am a beginner of R, just have dealt with MATLAB or JAVA.
I want to know how to solve one problem given 4 variables: year_1, year_2,
tall_1, tall_2.
The tall_1 is measured at year_1 and tall_2 at year_2.
The tall has grown up such as uniformly 1 cm/yr.
The data is like
year_1 year_2 tall_1 tall_2
2007 2010 12 15
1999 2009 6 16
2003 2005 11 13
2002 2009 3 10
. . . . .
. . . . .
. . . . .
. . . . .
So I need to get the average tall of the plant against year, for all the
years of available data.
The year_1 and year_2 are recorded so that a plant is alive if the year of a
question is equal to or grater than the year_1 and equal to and less than
the year_2.
For example,
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
2009 2010
6 7 8 9 10 11 12
13 14 15 16
3 4 5 6
7 8 9 10
11 12 13
12 13 14 15
avg
6 7 8 6 25/3 ...etc.
Since the amount of the data is too huge, I need to use appropriate
functions and algorithm but I am
not good at programming R.
I wish you help me out from this hell problem please.
Thanks,
Keeeeeeee
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