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2006 Sep 18
0
Question on apply() with more information...
>From: =?ISO646-US?Q?Gunther_H=3Fning?= <gunther.hoening at ukmainz.de>
>Date: 2006/09/18 Mon AM 06:26:25 CDT
>To: 'Petr Pikal' <petr.pikal at precheza.cz>
>Cc: r-help at stat.math.ethz.ch
>Subject: Re: [R] Question on apply() with more information...
I think you want something like below but it
probably needs some fixing up because i...
2006 Jul 28
1
Calculate x-values from a spline
..., 0.7983333, 0.8220000, 0.8151515) as
weights
f <- smooth.spline(x,y,w)
Now I have y-values and want to calculate the x-value(s) from this spline.
There is no further limitation to the spline, like monotonicity or anything
else..
Does anyone know how to do this ?
Gunther
gunther.hoening at ukmainz.de
2007 Jun 08
4
match rows of data frame
Hi R-experts,
I have a data frame (A) , and a subset (B) of this data frame. I am trying
to create a new data frame which gives me all the rows of B, plus the 5th
next row(occuring in A). I have used the below code, but it gives me all 5
rows after the matching row. I only want the 5th.
FiveDaysLater <- A[c(sapply(match(rownames(B),rownames(A)), seq,
length=6))),]
Any guidance much
2006 Jul 21
1
Merge two dataframes of different column length and row length by two columns at a time
...2 2 2 2 2 2 ...
>
I want to merge these dataframes by V1 and V2 of a and b. The combination of
V1, V2 is a unique key.
Note that b is smaller than a.
Any suggestions to solve this problem ?
Gunther H?ning
Diplom Physiker
Bioinformatiker
Langenbeckstra?e1
55131 Mainz
gunther.hoening at ukmainz.de