[R] Taking the Average of a subset of data

[Bert Gunter]

Read the posting guide, please, paying particular attention to how to
provide reproducible data, e.g. via ?dput. You are much more likely to get
useful help if you do what it recommends and provide data for people to
work with.

You also should provide code showing us what you tried. You appear not to
have done much homework of your own -- have you gone through some R
tutorials, for example? Which ones?

Cheers,
Bert





Bert Gunter

"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Fri, Feb 15, 2019 at 12:26 PM Isaac Barnhart <ihb using ksu.edu> wrote:

> Hello all, I have another question. I'm working with the following dataset:
>
>
>
>
>
>
> plot    plant   leaf_number     sen_score       plot_lai        plant_lai
>      lai_score       leaf_num
> 104     5       1       90      104     1       82      1
> 104     5       2       90      104     1       167     2
> 104     5       3       95      104     1       248     3
> 104     5       4       100     104     1       343     4
> 104     6       1       95      104     1       377     5
> 104     6       2       85      104     1       372     6
> 104     6       3       90      104     1       335     7
> 104     6       4       90      104     1       221     8
> 105     5       1       90      104     1       162     9
> 105     5       2       95      104     2       145     1
> 105     5       3       100     104     2       235     2
> 105     5       4       100     104     2       310     3
> 105     6       1       70      104     2       393     4
> 105     6       2       80      104     2       455     5
> 105     6       3       90      104     2       472     6
> 105     6       4       80      104     2       445     7
> 106     5       1       100     104     2       330     8
> 106     5       2       90      104     2       292     9
> 106     5       3       100     105     1       64      1
> 106     5       4       100     105     1       139     2
> 106     5       10      0       105     1       211     3
> 106     6       1       100     105     1       296     4
> 106     6       2       30      105     1       348     5
> 106     6       3       100     105     1       392     6
> 106     6       4       40      105     1       405     7
> 108     5       1       100     105     1       379     8
> 108     5       2       100     105     1       278     9
> 108     5       3       100     105     2       64      1
> 108     5       4       100     105     2       209     2
>
> (Note: 'plant' and 'leaf' column should be separated. '51' means plant 5,
> leaf 1).
>
>
> This dataset shows two datasets: The left 4 columns are of one
> measurement (leaf senescence), and the right 4 columns are of another (leaf
> area index). I have a large amount of plots, and several plants, more than
> what is listed.
>
>
> I need to sort both datasets (senescence and leaf area index) so that each
> plot has the same number of leaves.
>
>
> This is hard because sometimes plots in the 'senescence' dataset have more
> leaves, and sometimes plots in the 'leaf area index'. Is there a way to
> sort both datasets so that this requirement is met? Like I said, there is
> no way to tell which dataset has the plot with the minimum amount of
> leaves; it can be either one in any case.
>
>
> Any help would be appreciated!
>
>
> Isaac
>
>
>         [[alternative HTML version deleted]]
>
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>

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