Displaying 6 results from an estimated 6 matches for "nistunits".
2018 Jan 30
2
Calculating angle of a polyline
Assuming your polyline is defined by two vectors, one for the x
coordinates, one for the y coordinates, you can try the following
library(NISTunits)
polyangles <- function(xV,yV) {
stopifnot( (length(xV)==length(yV)) && (length(xV) >= 3))
v <- function(i) { c( xV[i]-xV[i-1], yV[i]-yV[i-1])}
vlen <- function(v) { sqrt(sum(v*v)) }
lV <- rep(NA_real_,length(xV))
for ( i in 2:(length(xV)-1) )
lV[i] <- acos(...
2018 Jan 30
0
Calculating angle of a polyline
...45 NA
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Tue, Jan 30, 2018 at 7:09 AM, Eric Berger <ericjberger at gmail.com> wrote:
> Assuming your polyline is defined by two vectors, one for the x
> coordinates, one for the y coordinates, you can try the following
>
> library(NISTunits)
> polyangles <- function(xV,yV) {
> stopifnot( (length(xV)==length(yV)) && (length(xV) >= 3))
> v <- function(i) { c( xV[i]-xV[i-1], yV[i]-yV[i-1])}
> vlen <- function(v) { sqrt(sum(v*v)) }
>
> lV <- rep(NA_real_,length(xV))
> for ( i in 2:(len...
2018 Jan 30
2
Calculating angle of a polyline
Dear R users
I am trying to find a formula to calculate the angle of a polyline. Is
there a way to do this?
Many thanks.
--
Best Regards
Javad Bayat
M.Sc. Environment Engineering
Alternative Mail: bayat194 at yahoo.com
[[alternative HTML version deleted]]
2018 Jan 30
0
Calculating angle of a polyline
A polyline by definition has many angles, so your question is ill-formed. And this is a question about math, not R, so is off topic here. I suggest reading Wikipedia.
--
Sent from my phone. Please excuse my brevity.
On January 29, 2018 11:10:02 PM PST, javad bayat <j.bayat194 at gmail.com> wrote:
>Dear R users
>I am trying to find a formula to calculate the angle of a polyline. Is
2020 Jun 26
2
R 4.0.0 rebuild status
On Friday, 26 June 2020 10.47.13 WEST I?aki Ucar wrote:
> I used bcond locally and wrongly assumed that fedpkg build would
> support --with BCOND and --without BCOND. Instead, the way to activate
> it is to change to "%bcond_with check" and then revert to
> "%bcond_without check". The only difference with bootstrap is that
> "bootstrap" is recognized
2019 Jul 04
2
Fwd: Fedora 31 System-Wide change proposal: Automatic R runtime dependencies
...kern
* R-lubridate
* R-maanova
* R-magrittr
* R-mapproj
* R-maps
* R-mAr
* R-markdown
* R-matrixStats
* R-measurements
* R-memoise
* R-microbenchmark
* R-mime
* R-miniUI
* R-mlbench
* R-mnormt
* R-mockery
* R-mockr
* R-msm
* R-multcomp
* R-multtest
* R-munsell
* R-mvtnorm
* R-nanotime
* R-ncdf4
* R-NISTunits
* R-nws
* R-nycflights13
* R-openssl
* R-orcutt
* R-packrat
* R-parsedate
* R-pbdRPC
* R-pbdZMQ
* R-pdftools
* R-pillar
* R-pingr
* R-pkgbuild
* R-pkgconfig
* R-pkgdown
* R-pkgload
* R-plogr
* R-pls
* R-plyr
* R-png
* R-poLCA
* R-polyclip
* R-polynom
* R-praise
* R-preprocessCore
* R-prettycode
* R...