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8 results for “from:j. van den hoff”

how to derive true surface area from `computeContour3d' (misc3d package) -- follow up
j. van den hoff · Nov 8, 2013 · r-help

regarding my previous mail for this topic, I have in the meantime identified my misconception. actually, `computeContour3d' returns the vertices just fine in the correct coordinate frame. the misconception was caused basically by assuming that the `level' argument was a...

how to derive true surface area from `computeContour3d' (misc3d package) -- follow up
j. van den hoff · Nov 8, 2013 · r-help

On Fri, 08 Nov 2013 15:32:00 +0100, Barry Rowlingson <b.rowlingson at lancaster.ac.uk> wrote: > On Fri, Nov 8, 2013 at 1:01 PM, j. van den hoff > <veedeehjay at googlemail.com> wrote: > > >> ps: it of course...

color handling in `barplot' inconsistent betwen `beside=FALSE' and `beside=TRUE'
j. van den hoff · Apr 20, 2015 · r-help

On Mon, 20 Apr 2015 18:10:10 +0200, Marc Schwartz <marc_schwartz at me.com> wrote: > On Apr 20, 2015, at 10:01 AM, j. van den hoff > <veedeehjay at googlemail.com> wrote: >> >> hi, >> >> consider the following example: >> >> 8...

color handling in `barplot' inconsistent betwen `beside=FALSE' and `beside=TRUE'
j. van den hoff · Apr 20, 2015 · r-help

hi, consider the following example: 8<------------------------------------- x <- matrix(1:6, 3, 2) layout(1:2) barplot(x, beside = TRUE, col = 1:6) barplot(x, beside = FALSE, col = 1:6) 8<------------------------------------- it seems, it is not possible to make `beside=FAlSE...

`level' definition in `computeContour3d' (misc3d package)
j. van den hoff · Nov 9, 2013 · r-help

I'd very much appreciate some help here: I'm in the process of clarifying whether I can use `computeContour3d' to derive estimates of the surface area of a single closed isosurface (and prospectively the enclosed volume). getting the surface...

`level' definition in `computeContour3d' (misc3d package)
j. van den hoff · Nov 9, 2013 · r-help

On Sat, 09 Nov 2013 18:18:23 +0100, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > On 13-11-09 11:57 AM, j. van den hoff wrote: >> On Sat, 09 Nov 2013 17:16:28 +0100, Duncan Murdoch...

`level' definition in `computeContour3d' (misc3d package)
j. van den hoff · Nov 9, 2013 · r-help

On Sat, 09 Nov 2013 17:16:28 +0100, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > On 13-11-09 8:50 AM, j. van den hoff wrote: >> I'd very much appreciate some help here: I'm in...

how to derive true surface area from `computeContour3d' (misc3d package)
j. van den hoff · Nov 8, 2013 · r-help

I want to compute the total surface area of an isosurface in 3D space as approximated with `computeContour3d' by adding up the areas of the triangles making up the contour surface. problem: the vertex matrix returned by `computeContour3d' in general...

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