On Oct 30, 2010, at 3:00 PM, Matevž Pavlič wrote:
Just one more thing...
I get a list with 15 data.frames :
List of 15
$ 1:'data.frame': 7 obs. of 9 variables:
..$ vrtina : Factor w/ 6 levels "T1A-1","T1A-2",..: 1 1 2 2
5 5 5
..$ globina.meritve: num [1:7] 7.6 8.5 10.4 17.4 12.5 15.5 16.5
..$ E0 : num [1:7] 4109 2533 491 810 2374 ...
..$ Eur1 : num [1:7] 6194 4713 605 1473 NA ...
..$ Eur2 : num [1:7] 3665 7216 266 4794 7387 ...
..$ Eur3 : num [1:7] 3221 3545 920 3347 6768 ...
..$ H : num [1:7] 8 5.9 5.9 6.9 9.3 10.9 10
..$ Mpl : num [1:7] 61.9 136.7 19.9 96.4 178.5 ...
..$ class : int [1:7] 1 1 1 1 1 1 1
.
But how would I acces them (i.e. to draw a plot for each data.frame
for each data.frame in a list)?
Something along the lines of one of these:
lapply(dfrm.list, function(xfrm) with(xfrm, plot(Mpl, E0) ) )
lapply(dfrm.list, function(xfrm) plot(E0 ~ Mpl, data=xfrm) ) )
... assuming you wanted a scatterplot. If you wanted them all on one
page, then see:
?layout
If you used lattice or ggplot plotting function they do not work via
side-effects and so you could assign the results creating a list of
plots.
--
DAvid.
Thanks,m
-----Original Message-----
From: David Winsemius [mailto:dwinsem...@comcast.net]
Sent: Saturday, October 30, 2010 8:24 PM
To: Matevž Pavlič
Cc: r-help@r-project.org
Subject: Re: [R] for loop
On Oct 30, 2010, at 2:07 PM, Matevž Pavlič wrote:
Hi,
I know this is probalby a very trivial thing to do for most of the R
users, but since I just strated using it I have some problems....
I have a data.frame with a field called "razred". This field has
values from 1 up to 15.
Is it possible to create a for loop that would create a new data
frame
for each of the "razred" values.
The R-way would be to use the split function and leave the result in
a list to which the same operation could be also repeatedly
performed using lapply.
?split
And take a look at the fourth example applying split to the builtin
airquality dataframe.
The plyr package also provides functions on dataframes.
--
David Winsemius, MD
West Hartford, CT
David Winsemius, MD
West Hartford, CT
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