Dear all,
I was doing some self study and was wondering if a function already
exists which allows one to determine the angle between points. e.g.
given the following (x,y) coordinates
input: (0,1); (0,0); (1,0)
would result in:
output: 90 degrees
Best regards
C.C.
___
Thank you very much, these were exactly what i needed! :-)
C.C.
On 1 Sep, 14:08, "clair.crossup...@googlemail.com"
wrote:
> Dear all,
>
> I was doing some self study and was wondering if a function already
> exists which allows one to determine the angle between poi
Dear all,
Lets say I have a data frame as follows:
> Date <- as.Date(c('2006-08-23', '2006-08-30', '2006-09-06', '2006-09-13',
> '2006-09-20'))
> Income <- c(73.79, 72.46, 76.32, 72.43, 72.62)
> data.frame(Date, Income)
Date Income
1 2006-08-23 73.79
2 2006-08-30 72.46
3 2006-09-06 7
Dear all,
I am having an issue with displaying the dates on a plot with two
ordinates (i.e. two differently scaled y-axes). Instead of dates
appearing on the x-axis I am instead seeing a string of numbers
(14460, 14465, 14470 and 14475).
example R code:
library(plotrix)
x.Left <- as.Date(c('2009
Good day, i imported some data into R from Excel. By using the edit()
function, this is what one of the dates looks like in R:
> x <- structure(1254351600, class = c("POSIXt", "POSIXct"), tzone = "")
[1] "2009-10-01 BST"
However, when i do the following, the date changes:
> as.Date(x, formate="
Dear all,
If I have the following data frame:
> set.seed(21)
> df1 <- data.frame(col1=c(rep('a',5), rep('b',5), rep('c',5)),
> col4=rnorm(1:15))
col1 col4
1 a 0.793013171
2 a 0.522251264
3 a 1.74641
4 a -1.271336123
5 a 2.197389533
6 b 0.433130777
7
Dear all,
If I have the following data frame:
> set.seed(21)
> df1 <- data.frame(col1=c(rep('a',5), rep('b',5), rep('c',5)),
> col4=rnorm(1:15))
col1 col4
1 a 0.793013171
2 a 0.522251264
3 a 1.74641
4 a -1.271336123
5 a 2.197389533
6 b 0.433130777
7
Dear R-help,
There seems to be a web page I am unable to download using RCurl. I
don't understand why it won't download:
> library(RCurl)
> my.url <-
> "http://www.nytimes.com/2009/01/07/technology/business-computing/07program.html?_r=2";
> getURL(my.url)
[1] ""
Other web pages are ok to downl
om/) but
if i can get this verbose to work, then i think i will be able to
google the right action to take based on the information it gives.
Many thanks for your time,
C.C.
On 26 Jan, 16:12, Duncan Temple Lang wrote:
> clair.crossup...@googlemail.com wrote:
> > Dear R-help,
>
&g
Thank you. The output i get from that example is below:
> d = debugGatherer()
> getURL("http://uk.youtube.com";,
+ debugfunction = d$update, verbose = TRUE )
[1] ""
> d$value()
text
"About to connect() to uk.youtube.com port 80 (#0)\n Trying
208.117.236.72... connected\nConnected to uk
In readLines("http://uk.youtube.com";) :
incomplete final line found on 'http://uk.youtube.com'
>
On 27 Jan, 16:02, "clair.crossup...@googlemail.com"
wrote:
> Thank you. The output i get from that example is below:
>
> > d = debugGatherer()
> > getURL(&
gent.
>
> If you use
>
> getURL("http://www.youtube.com";,
> httpheader = c("User-Agent" = "R (2.9.0)")))
>
> you should get the contents of the page as expected.
>
> (Or with URL uk.youtube.com, etc.)
>
> D.
>
>
&
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