Hi
Sorry to ask such a well oiled question, but even with multiple google hits I
don't think this has been answered very well.
It's all well and good doing a sort of a data frame on multiple columns when
you know in advance which columns you want to sort on, but what about when the
names of
DF - data.frame(a = c(3, 4, 2, 3, 2, 4, 2), b = 7:1))
DF[do.call(order, DF),]
will sort on all the columns.
On 11/28/06, michael watson (IAH-C) [EMAIL PROTECTED] wrote:
Hi
Sorry to ask such a well oiled question, but even with multiple google hits I
don't think this has been answered very
@stat.math.ethz.ch
Sent: Tuesday, November 28, 2006 11:45 AM
Subject: [R] Sorting a data frame when you don't know the columns
Hi
Sorry to ask such a well oiled question, but even with multiple
google hits I don't think this has been answered very well.
It's all well and good doing a sort of a data
Thanks guys, sorted now :)
From: Peter Dalgaard [mailto:[EMAIL PROTECTED]
Sent: Tue 28/11/2006 11:05 AM
To: Gabor Grothendieck
Cc: michael watson (IAH-C); r-help@stat.math.ethz.ch
Subject: Re: [R] Sorting a data frame when you don't know the columns
Gabor
Gabor Grothendieck wrote:
DF - data.frame(a = c(3, 4, 2, 3, 2, 4, 2), b = 7:1))
DF[do.call(order, DF),]
will sort on all the columns.
... and you can use
DF[do.call(order, DF[names]),]
if you have the column names in a character vector.
On 11/28/06, michael watson (IAH-C) [EMAIL
FAQ 7.23 How can I sort the rows of a data frame?
To sort the rows within a data frame, with respect to the values in one or more
of the columns, simply use order().
=== 2005-10-16 13:29:44 您在来信中写道：===
Dear all,
I have a date frame like this:
X Y Z
22 24 4.3
Leaf,
using your example data as 'dat' below --
dat-read.table(clipboard,header=T)
dat
XYZ
1 22.0 24.0 4.3
2 2.3 3.4 5.3
3 57.2 23.4 34.0
#to order the data frame by say X (for column 1)--
dat1-dat[order(dat[,1]),]
dat1
XYZ
2 2.3 3.4 5.3
1 22.0 24.0 4.3
3
Dear all,
I have a date frame like this:
X Y Z
22 24 4.3
2.3 3.4 5.3
.
57.223.434
What my purpose is: to sort the data frame by either X, Y or Z.
sample output is (sorted by X) :
X Y Z
2.3 3.4 5.3
.
..
22 24 4.3
...
57.2 23.4 34
I have
Hi!
I think this is an important example! Is there a way to make it included
in the help of order?
Maybe a shortened version:
# sorting a data frame
df - data.frame(V1 = c(W,A, A, B, ), V2 = c(E, M, B,
O, Q))
sorted - df[order(df$V1, df$V2), ]
And a question: what to do to have the sorted
On Thu, 31 Jul 2003, BORGULYA Gábor wrote:
I think this is an important example! Is there a way to make it included
in the help of order?
Please explain why it adds to what is already there, which looks very
similar to me.
Maybe a shortened version:
# sorting a data frame
df -
Hi there R-Helpers,
Does anyone know if it is possible to sort a dataframe?
I.e. Sort alphabetically column 1 ( which has some reocurring elements) then
sort alphabetically column2 but keeping the order of column 1 constant;
much the same way that the sort function works in Excel.
Regards,
?order
hope this helps. spencer graves
Wayne Jones wrote:
Hi there R-Helpers,
Does anyone know if it is possible to sort a dataframe?
I.e. Sort alphabetically column 1 ( which has some reocurring elements) then
sort alphabetically column2 but keeping the order of column 1 constant;
much the
On Wed, 16 Jul 2003 14:42:09 +0100, Wayne Jones [EMAIL PROTECTED]
wrote :
Hi there R-Helpers,
Does anyone know if it is possible to sort a dataframe?
I.e. Sort alphabetically column 1 ( which has some reocurring elements) then
sort alphabetically column2 but keeping the order of column 1
On Wed, 2003-07-16 at 08:42, Wayne Jones wrote:
Hi there R-Helpers,
Does anyone know if it is possible to sort a dataframe?
I.e. Sort alphabetically column 1 ( which has some reocurring elements) then
sort alphabetically column2 but keeping the order of column 1 constant;
much the same
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