Hi All..
Have a question.. For the following r code
testdata <- as.data.frame(t(structure(c(
"1/1/04","LV1",3.8,2,87,
"2/1/04","LV1",3.2,3,28,
"3/1/04","LV1",3.4,3,88,
"4/1/04","LV1",3,2,26,
"5/1/04","LV1",3.8,2,87,
"6/1/04","LV1",3.2,3,28,
"7/1/04","LV1",3.4,3,88,
"8/1/04","LV1",3,2,26,
"9/1/04","LV1",3.8,2,87,
"10/1/04","LV1",3.2,3,28,
"11/1/04","LV1",3.4,3,88,
"12/1/04","LV1",3,2,26,
"1/1/05","LV1",3.8,2,87,
"2/1/05","LV1",3.2,3,28,
"3/1/05","LV1",3.4,3,88,
"4/1/05","LV1",3,2,26
), .Dim=c(5,16))));
colnames(testdata) <- c('date','dataset','mean','stdDev','miceCount');
testdata[c("date")] <- lapply(testdata[c("date")], function(x)
as.date(levels(x)[x]));
testdata[c("mean")] <- lapply(testdata[c("mean")], function(x)
as.numeric(levels(x)[x]));
On trying to print the data frame
>testdata
I get this..
date dataset mean stdErr miceCount
1 -20454 LV1 3.8 2 87
2 -20423 LV1 3.2 3 28
3 -20394 LV1 3.4 3 88
4 -20363 LV1 3.0 2 26
5 -20333 LV1 3.8 2 87
6 -20302 LV1 3.2 3 28
7 -20272 LV1 3.4 3 88
8 -20241 LV1 3.0 2 26
9 -20210 LV1 3.8 2 87
10 -20180 LV1 3.2 3 28
11 -20149 LV1 3.4 3 88
12 -20119 LV1 3.0 2 26
13 -20088 LV1 3.8 2 87
14 -20057 LV1 3.2 3 28
15 -20029 LV1 3.4 3 88
16 -19998 LV1 3.0 2 26
where as when I run this
>dates <- c(lapply(testdata[c("date")], function(x) as.date(levels(x)[x])));
the ouput is
$date
[1] 1Jan4 1Feb4 1Mar4 1Apr4 1May4 1Jun4 1Jul4 1Aug4 1Sep4 1Oct4 1Nov4 1Dec4
[13] 1Jan5 1Feb5 1Mar5 1Apr5
Question:
1. Can someone please explain me why the difference.
2. I later want to plot the data using barchart eg (barchart(date ~ mean |
dataset, data=testdata);) in which case will the dates appear in assending
order of dates or something special needs to be done for that.
3. Also I'll really appreciate if anyone can tell me if there's a way to get
stdErrorBars on charts that are drawn using barchart function in lattice
package.
Any help or advise is greatly appreciated...
Thanks,
Sandeep.
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