Displaying 20 results from an estimated 1000 matches similar to: "Change the language of the labels in a graph"
2006 Apr 05
2
gsub in data frame
Hello,
I have this data frame:
### begin
d <-data.frame(matrix(c("1","--","bla",2),2,2))
d
# I want to replace the "--" by "\N" and still get a data frame.
# I tried:
out <-gsub("--","\\\\N",as.matrix(d)) #using as.matrix to get rid of factors
out
cat(out)
# But I lost my data frame
### end
Any idea?
Regards,
2006 Nov 06
2
grep searching for sequence of 3 consecutive upper case letters
Hello,
I need to identify all elements which have a sequence of 3 consecutive upper
case letters, anywhere in the string.
I tested my grep expression on this site: http://regexlib.com/RETester.aspx
But when I try it in R, it does not filter anything.
str <-c("AGH", "this WOUld be good", "Not Good at All")
str[grep('[A-Z]{3}',str)] #looking for a
2006 Jul 19
1
How would you export a 3-dimensional array to an SQL database?
Hello,
How would you export a 3-dimensional array to an SQL database?
a<-array(1:24, 2:4)
Is there an open source DB that would be more adequate for this type of
operation?
Is there a way to reshape/flatten a 3-dimensional array?
Regards,
Pierre Lapointe
**************************************************
AVIS DE NON-RESPONSABILITE: Ce document transmis par courrie...{{dropped}}
2006 Nov 07
1
Gregexpr - extract results with lapply
Gregexpr - extract results with lapply
Hello,
I need to extract sequences of three upper case letters in a string. In
other words, in this string:
str <-c("ABC", "this WOUld be gOOD")
The result I'm looking for is ABC WOU OOD.
With gregexpr, I can get the position and length of the sequences
gregexpr('[A-Z]{3}',str,perl=TRUE)
[[1]]
[1] 1
2007 Jan 16
1
system(mysql... Does not recognize < as passing an attribute (No HTML)
Hi,
This is my command line request: mysql -u root -ppassword -D quant
<c:/cline.txt
This line works from the command line in windows.
In R, when I try to use the system function, it does not work,
> system(paste('mysql -u root -ppassword -D quant
<c:/cline.txt'),show.output.on.console = TRUE)
ERROR 1102 (42000): Incorrect database name '<c:/cline.txt'
It seems
2006 Mar 14
2
Multi-line paste function
Here's my contribution to R.
When R interacts with external programs (MySQL, cURL, etc.), it often
requires a pasted string that is sent to these programs. For readability
reasons, it is often preferable to have complex commands (SQL for example)
spread on several lines. However, the normal paste function requires to add
additional ' ", ' at the end of each line and another '
2006 Jun 09
3
sqlSave() and rownames=TRUE makes my Rgui crash
Hello,
I created a table in MySQL with this command
CREATE TABLE example (pk INT NOT NULL AUTO_INCREMENT,PRIMARY KEY(pk),
id VARCHAR(30),col1 VARCHAR(30),col2 VARCHAR(30))
### In R, I can connect to this table:
library(DBI)
library(RODBC)
chan <- odbcConnect("MySQL51", uid="root", pwd="xxx")
first <- sqlQuery(chan, "select * from example")
2005 May 19
5
Arranging Plots
Dear all,
I'd appreciate any hints how to arrange some plots.
I have three plots. I would like to arrange them in the following order:
- Plot 1 and Plot 2 should be in the upper row
- Plot 3 should be in the lower row but centered in the middle.
I hope the following sketch will help understanding my problem
================
| === === |
|| P1| |P2 | |
|| | | | |
| === === |
2005 May 22
4
Calling R from R and specifying "wait until script is finished"
Hello,
Let's say I have 50 R scripts to run. What would be the most efficient way
to run them?
I thought I could do multiple Rterms in a DOS batch file:
Ex:
Rterm <1.R> 1.txt
Rterm <2.R> 2.txt
...
Rterm <50.R> 50.txt
However, I'm afraid they will all open at the same time. I know I could
pause the batch file with something like:
PING 1.1.1.1 -n 1 -w 60000
2007 Jan 16
1
system(mysql... Does not recognize < as passing an attribute
Hi,
This is my command line request: mysql -u root -ppassword -D quant
<c:/cline.txt
This line works from the command line in windows.
In R, when I try to use the system function, it does not work,
> system(paste('mysql -u root -ppassword -D quant
<c:/cline.txt'),show.output.on.console = TRUE)
ERROR 1102 (42000): Incorrect database name '<c:/cline.txt'
It seems
2006 Mar 29
1
Data assimilation / inverse modeling in R
Hello,
I'm trying to find out if something has been written in R regarding data
assimilation and inverse modeling.
These searches do not return anything that look like Kalman filter
variations (EK, SEEK, ROEK, etc.)
help.search("assimilation")
help.search("inverse model")
Regards,
**************************************************
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2005 May 25
1
Plot: Distance between tick and tick label on y-axis
Hello,
I want to reduce the distance between my ticks and their labels. I managed
to do it for the x-axis, but the y-axis puzzles me. Here's an example where
there is no space between the x-asix ticks and labels.
par(las=1)
plot(runif(50), type="l",xaxt="n",yaxt="n",ylab="", bty="l")
axis(2)
axis(1,padj=-1.5)
#However,
axis(2,padj=-1.5)
2005 May 26
1
Useful tip: Use Google to find R scripts
Hello,
Ever wondered how people use a particular function in their programs? Use
Google to find actual scripts:
filetype:R boxplot
will return real R scripts using the boxplot function.
Regards,
Pierre Lapointe
Assistant Market Strategist
***********************************************************************************
AVIS DE NON-RESPONSABILITE:\ Ce document transmis par
2005 Jun 08
1
RODBC question: problem importing series with blank cells
Hello,
I have an excel file that I load through RODBC. Some of my columns are
blank. They are equity time series and the stocks did not exist at the
earlier dates. My problem is that the whole column becomes <NA> even though
there are numbers at later dates.
Here's my excel file
http://www.tradebit.com/download.php/35699
<http://www.tradebit.com/download.php/35699>
And
2009 Oct 26
3
as.POSIXct month problem
Hi everybody
When I try example of strptime
x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
z <- strptime(x, "%d%b%Y")
The result is;
> z
[1] NA NA NA NA
I have got the same result with complete form of month but not with numeric
form.
Any idea?
[[alternative HTML version deleted]]
2005 Jun 14
1
Matrix stability problem
Hello,
This is not a problem with R, the calculated results are mathematically
correct. This a matrix stability problem. Because of measuring errors, my
matrix solution is a bit off.
Here is what my equations look like:
A11 x11+A12 x12 +A13 x13 = b1
A21 x21+A22 x21 +A23 x23 = b2
A31 x31+A32 x31 +A33 x33 = b3
A is a reading, X is a measured weight, and b is total. The 3 experiments
give
2006 May 20
2
Function as.Date leading to error implying that strptime requires 3 arguments
I'm using R V 2.2.1. When I try an example from the as.Date help page,
I get an error.
> x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
> z <- as.Date(x, "%d%b%Y")
Error in strptime(x, format) : 2 arguments passed to 'strptime' which
requires 3
>
Any suggestions would be appreciated.
Thanks,
Rob
2001 Jan 11
2
problem with strptime example (PR#811)
On Thu, 11 Jan 2001 stephen@anc.ed.ac.uk wrote:
> Hi,
>
> The help file for strptime has the following code which doesn't work
> for me:
>
> ## read in date info in format `ddmmmyyyy'
> x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
> z <- strptime(x, "%d%b%Y")
> > z
> [1]
2001 Oct 01
2
problem with strptime example (PR#811)
Hello,
strptime is still not working correctly in my computer
(Windows 98 and R Version 1.3.1)
From
x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
strptime(x, "%d%b%Y")
I obtain
[1] "NA" "NA" "NA" "NA"
while
x <- c("01011960", "02011960", "3131960",
2000 Jul 01
1
No subject
Dear friends. Library Date was updated recently. I do not remember having
seen the error below until now ? The plot title is made appropriately but
the error message may be annoying, right ? I use version 1.1 on windows 98.
library(date)
tt <- as.date(c("1jan1960", "2jan1960", "31mar1960", "30jul1960"))
plot(tt,c(1:4),main="How's that ?")