search for: equilateral

Hi, I just encountered what I thought was strange behavior in MDS. However, it turned out that the mistake was mine. The lesson learned from my mistake is that one should plot on a square pane when plotting results of an MDS. Not doing so can be very misleading. Follow the example of an equilateral triangle below to see what I mean. I hope this helps others to avoid this kind of headache. Let's say I have an equilateral triangle. Then, the three Euclidean distances between points A, B, and C are all equal. That is, dist(AB)=dist(AC)=dist(BC). Let the points A, B, and C have (x,y)-coordi...

Hello, I now trying to solve this one : # Triangle Project Code. # Triangle analyzes the lengths of the sides of a triangle # (represented by a, b and c) and returns the type of triangle. # # It returns: # :equilateral if all sides are equal # :isosceles if exactly 2 sides are equal # :scalene if no sides are equal # # The tests for this method can be found in # about_triangle_project.rb # and # about_triangle_project_2.rb # def triangle(a, b, c) if ((a == b) and (b == c)) return :equila...

Suppose I have three numbers p1, p2, p3 with 0 <= p1,p2,p3 <= 1 and p1+p2+p3=1, and a function f=f(p1,p2,p3) = f(p1,p2,1-p1-p2). How to draw a contour plot of f() on the p1+p2+p3=1 plane, that is, an equilateral triangle? Functions triplot(), triangle.plot(), and ternaryplot() give only scatterplots, AFAICS -- Robin Hankin Uncertainty Analyst National Oceanography Centre, Southampton European Way, Southampton SO14 3ZH, UK tel 023-8059-7743

...text(conv.ter(c(rep(-3,6)), c(102,82,62,42,22,2)), c("0", "20", "40", "60", "80", "100"), cex = 0.75 ) } The label for the Sand axis (first text line above) is not shown. The second problem I have with this is that the triangle should be equilateral but when I print it the triangle is not. If I use par(pty = "s") before the plot.psd call than the triangle is always stretched vertically. Any Ideas? With best wishes and kind regards I am Sincerely, Corey A. Moffet Instructor Department of Range, Wildlife, and Fisheries Management...

Hi all, I am working on a filled contour plot which shows a triangular matrix data set (as shown below). Is there a possibilty to draw a triangular filled contour in a equilateral triangle (like a ternary plot)? Thanks in advance Johannes http://n4.nabble.com/file/n1557386/Bild3.png -- View this message in context: http://n4.nabble.com/Triangular-filled-contour-plot-tp1557386p1557386.html Sent from the R help mailing list archive at Nabble.com.

...briele On Mon, May 3, 2010 at 2:29 PM, Jim Lemon <jim at bitwrit.com.au> wrote: > On 05/03/2010 09:43 PM, Gabriele Esposito wrote: >> >> Good afternoon, >> >> I am looking for a way to do a scatterplot of 4 values summing to 1 >> inside a 3D symplex, i.e. an equilateral pyramid. With the function >> triax.plot I can do that with 3 values summing to 1, but I can't find >> an equivalent with an extra dimension. >> > Hi Gabriele, > > I don't have time at the moment to do anything but point you to the rgl > package. Might be able...