Re: A nonconventional ListContourPlot

*To*: mathgroup at smc.vnet.net*Subject*: [mg129915] Re: A nonconventional ListContourPlot*From*: Luiz Melo <lmelo at ufsj.edu.br>*Date*: Mon, 25 Feb 2013 02:22:58 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <20169426.30425.1361680665727.JavaMail.root@m06> <000a01ce12b3$98315960$c8940c20$@comcast.net>

Hi there I just realized that ListContourPlot can also take as argument a list of the kind {{x1, y1, f1}, {x2, y2,f2}, ....}, therefore the answer to my question is obvious: ListContourPlot[data] to David Park: the plot may seem strange to mathematicians but not in microwave engineering, where we often need a dispersion diagram of the reflectivity as a function of frequency and wave number. As is often the case, the wave number depends upon frequency, that's why in my example I choose the x and y axes be given by two functions of i and j. Anyway, thank you for taking your time to answer my question. Cheers. LM On Sun, Feb 24, 2013 at 2:22 PM, djmpark <djmpark at comcast.net> wrote: > ContourPlot[Sin[x + y^2], {x, -2, 2}, {y, -1, 1}, > ColorFunction -> ColorData["DarkRainbow"]] > > ?? > > Rather, why do you want to sample at your strange set of x,y values? Is the > z expression just a stand-in for actual measure values? You might try > Interpolation with InterpolatingOrder -> 1, but the results in this case do > not seem promising. > > > David Park > djmpark at comcast.net > http://home.comcast.net/~djmpark/index.html > > > > > From: Luiz Melo [mailto:lmelo at ufsj.edu.br] > > > Good day, > > x[a_,b_] = a*b; > y[a_,b_] = Cos[a^2 + b]; > z[a_,b_] = Sin[a + b^2]; > > data = Table[{x[i,j], y[i,j], z[i,j]}, {j, -1, 1, 0.1}, {i, -2, 2, 0.1}]; > > For the table above, is it possible to see a ListContourPlot of the z > component as a function of x and y (the values of x and y on the horizontal > and vertical axes, respectively)? > > Thank you in advance > Luiz Melo >