Re: Custom ContourLabels in Contour Plots
- To: mathgroup at smc.vnet.net
- Subject: [mg110266] Re: Custom ContourLabels in Contour Plots
- From: "David Park" <djmpark at comcast.net>
- Date: Fri, 11 Jun 2010 02:08:26 -0400 (EDT)
- References: <hm56ku$k47$1@smc.vnet.net> <17652030.1276184119509.JavaMail.root@n11>
I don't recall if I ever got an answer to that specific question. There was a change in the way ContourLabels works in Version 6 (or maybe 7) so you now use: ContourLabels -> Automatic for contour labels in tooltips only and ContourLabels -> True for explicit "printed" contour labels but no tooltips. But I'm not certain how you get both with plain Mathematica. With the Presentations package there is a DrawLineLabels routine that will place explicit contour labels on contour lines (and lines in any 2D plot that have a function of constant value on the line). So there you could draw the contour plot with ContourLabels -> Automatic to get tooltips, and then use DrawLineLabels to explicitly label the contours, or even a selected subset of contours. Another quirk of contour labeling is that if you generate a set of contours by using a Table or Range, say, Range[-1, 1, 0.2] you may get a nonzero "zero" value and an ugly label. I suggested to WRI that since an approximate zero might be a common case they use Chop on label values, but they thought it is better not to, so you have to do it yourself. David Park djmpark at comcast.net http://home.comcast.net/~djmpark/ From: Istv=E1n Zachar [mailto:zac at freemail.hu] I am interested in the solution as well! It seems so that this functionality exists only in theory (the documentation) but not in the field... Istvan On Feb 25, 8:51 am, "David Park" <djmp... at comcast.net> wrote: > I would like to specify custom contour labels in Tooltips for contour plot. > > ContourLabelshas a form {f, g} where f gives an explicit displayed label, > and g gives a Tooltip for each complete contour. But I can't make this form > work and the Help has no explicit example of this form. > > Here is an example of what I would like to do: > > ContourPlot[Sin[x y] == 1/2, {x, 0, \[Pi]}, {y, 0, \[Pi]}, > > ContourLabels-> > > {Function[{x, y, z}, Text["", {x, y}]], > > Function[{x, y, z}, Text["My Label"]]} > > ] > > No tooltips on the contours. I've tried a number of variations but nothing > works. Neither does it work on a regular ContourPlot. > > ContourPlot[Sin[x y], {x, 0, \[Pi]}, {y, 0, \[Pi]}, > > Contours -> 5, > > ContourLabels-> > > {Function[{x, y, z}, Text["", {x, y}]], > > Function[{x, y, z}, Tooltip["My Label"]]} > > ] > > Does anyone know how to do this? > > David Park > > djmp... at comcast.net > > <http://home.comcast.net/~djmpark>http://home.comcast.net/~djmpark/