r - Contour plots on a sphere surface -

-

i have acquired data @ fixed distance r , various theta (from vertical axis) , phi (from x axis) angles obtain 3d representation of quantity of interest. please note while phi spans 360°, theta spans 70° 90°.

i know how generate 3d plot plot3d package (namely, persp3d function) or contour plot, draw such contours on sphere using theta , phi angles information.

would please point me appropriate online resource can find suitable solution?

many , kind regards

nicola

this isn't 3d representation (e.g. in rgl), maybe gets started:

library(maps) library(mapproj)         library(akima)  set.seed(11) n <- 500 x <- runif(n, min=-180,max=180) y <- runif(n, min=-90,max=90) z <- x^2+y^3  param <- null proj <- "orthographic" orient <- c(45,15,0) xlim <- c(-180, 180) ylim <- c(-90, 90)  nlevels=20 pal <- colorramppalette(   c("purple4", "blue", "cyan", "yellow", "red", "pink")) map("world", col=na, param=param, proj=proj, orient=orient, xlim=xlim, ylim=ylim) p <- mapproject(x,y) incl <- which(!is.na(p$x)) field <- interp(p$x[incl],p$y[incl],z[incl],   xo=seq(min(p$x[incl]), max(p$x[incl]), length = 100),   yo=seq(min(p$y[incl]), max(p$y[incl]), length = 100) ) image(field, add=true, col=pal(nlevels)) points(p$x, p$y, pch=".", cex=2, col=4) cont <- contour(field, add=true, n=nlevels, col="white") lines(sin(seq(0,2*pi,,100)), cos(seq(0,2*pi,,100)), lwd=3)

enter image description here


Comments

Post a Comment

Popular posts from this blog

yii2 - Yii 2 Running a Cron in the basic template -

-
i have seen instructions on running cron in advanced template, cant figure out how on basic template. have following controller in basic controllers folder. <?php namespace app\controllers; use yii\console\controller; /** * cron controller */ class croncontroller extends controller { public function actionindex() { echo "cron service runnning"; } public function actionmail($to) { echo "sending mail " . $to; } } i have navigated root of application , tried these comands yii cron php yii cron im getting unknown comand "cron" i know old question failed find actual answer this. if @ code yii exec file you'll notice requires /common/config/aliases.php file console/config/main.php. can naturally change these or copy on these advanced template. hope solves problem wanting same thing.
Read more

asp.net - 'System.Web.HttpContext' does not contain a definition for 'GetOwinContext' Mystery -

-
i realize question might seem trivial some, it's these types of things find myself fighting quite bit , want make sense of despite seeming losing battle in .net (for me anyway). so, if following: using system.web; ... applicationuser user = system.web.httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); that produces error in title , red getowincontext() , error cannot resolve symbol 'getowincontext()' however, if following (remove system.web in front of httpcontext ), works expected (or @ least no errors): using system.web; ... applicationuser user = httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); however, if (same line that's working using system.web commented out): //using system.web; ... applicationuser user = httpcontext.getowincontext().getusermana...
Read more

mercurial graft feature, can it copy? -

-
there new feature in mercurial 3, called 'graft' (graft local). job of moving change-set different branch. is there way "copy" change-set branch? i interested in in moving stuff qa branch production branch, still need code reside in qa. want copy. found , have tried few things, maybe it'll become clear more tinkering , reading... does have better way of 'cherry picking' change-sets move cross branch (or trunk)??? graft copies changesets, doesn't move them. hg graft (emphasis mine): this command uses mercurial's merge logic copy individual changes other branches without merging branches in history graph. known 'backporting' or 'cherry-picking' . default, graft copy user, date, , description source changesets.
Read more