Hello, Sorry for this tread getting quite long, but I am not getting there yet. Online I found examples like:
#! /usr/bin/env python from pylab import * x=arange(-2,2,0.1) y=arange(-2,2,0.05) X,Y=meshgrid(x,y) z=exp(-(X*X + Y*Y)) + 0.6*exp(-((X+1.8)**2 + Y**2)) #contour(x,y,z,arange(0,1,0.1)) imshow(z,interpolation='nearest') show() and both the imshow() and contour() commands do nicely their job, but the scalar z is defined on a trivial rectangular domain and represented as a 2D array. In my problem I have: 1) a set of couples (theta,r) specifying a list of positions on a tube cross-section. 2) for each (theta,r) couple, I have a single value of T (which is thus a long 1D array). In general, (theta,r) may be two coordinates given on a non-trivial domain and I have a scalar specified for each couple I thus form. Both contour and imshow complain because they expect a 2D array. I am sorry if I am struggling over some triviality, but I am not making much progress by myself. Many thanks Lorenzo On 26/06/07, Brian <[EMAIL PROTECTED]> wrote: > It sounds to me that you want to have a contour plot which takes as input > the r,theta, and T. I would suggest just > > > On 6/26/07, Lorenzo Isella < [EMAIL PROTECTED]> wrote: > > > > Hello, > > Thanks for your suggestion, but I still have a problem. > > Maybe I did not make myself clear (or most likely I have a problem > > about how to implement your suggestion): actually I have T=T(r,theta) > > and I would like to make a 2D plot using colors such that one can see > > that the domain where I am plotting is actually a circle. > > The example I mentioned is not exactly what I need since there one can > > find how to plot in polar coordinates a function of r alone. > > Furthermore, I do not have necessarily an equally spaced grid. > > For instance, let me consider the case of 5 theta's and 7 radial > > position and consequentely 35 values of T: > > > > theta R > > T > > 0.000000000000000000e+00 0.000000000000000000e+00 5.459815003314423620e+01 > > 0.000000000000000000e+00 1.666666666666666574e-01 4.853828855239110851e+01 > > 0.000000000000000000e+00 3.333333333333333148e-01 4.315101251901344881e+01 > > 0.000000000000000000e+00 5.000000000000000000e-01 3.836167151642037965e+01 > > 0.000000000000000000e+00 6.666666666666666297e-01 3.410390059527122020e+01 > > 0.000000000000000000e+00 8.333333333333332593e-01 3.031870066752165016e+01 > > 0.000000000000000000e+00 1.000000000000000000e+00 2.695362096775039973e+01 > > 1.570796326794896558e+00 0.000000000000000000e+00 2.396203225329512776e+01 > > 1.570796326794896558e+00 1.666666666666666574e-01 2.130248067207563523e+01 > > 1.570796326794896558e+00 3.333333333333333148e-01 1.893811334477913277e+01 > > 1.570796326794896558e+00 5.000000000000000000e-01 1.683616770181326316e+01 > > 1.570796326794896558e+00 6.666666666666666297e-01 1.496751749887080329e+01 > > 1.570796326794896558e+00 8.333333333333332593e-01 1.330626922033307302e+01 > > 1.570796326794896558e+00 1.000000000000000000e+00 1.182940327795447999e+01 > > 3.141592653589793116e+00 0.000000000000000000e+00 1.051645503298913731e+01 > > 3.141592653589793116e+00 1.666666666666666574e-01 9.349231221746512333e+00 > > 3.141592653589793116e+00 3.333333333333333148e-01 8.311557855141172624e+00 > > 3.141592653589793116e+00 5.000000000000000000e-01 7.389056098930650407e+00 > > 3.141592653589793116e+00 6.666666666666666297e-01 6.568943029058285532e+00 > > 3.141592653589793116e+00 8.333333333333332593e-01 5.839854501207304871e+00 > > 3.141592653589793116e+00 1.000000000000000000e+00 5.191687680104649871e+00 > > 4.712388980384689674e+00 0.000000000000000000e+00 4.615461046534314882e+00 > > 4.712388980384689674e+00 1.666666666666666574e-01 4.103189942205120566e+00 > > 4.712388980384689674e+00 3.333333333333333148e-01 3.647775927922803252e+00 > > 4.712388980384689674e+00 5.000000000000000000e-01 3.242908421924544982e+00 > > 4.712388980384689674e+00 6.666666666666666297e-01 2.882977255397825012e+00 > > 4.712388980384689674e+00 8.333333333333332593e-01 2.562994933482758420e+00 > > 4.712388980384689674e+00 1.000000000000000000e+00 2.278527524544009530e+00 > > 6.283185307179586232e+00 0.000000000000000000e+00 2.025633220058637107e+00 > > 6.283185307179586232e+00 1.666666666666666574e-01 1.800807713756398032e+00 > > 6.283185307179586232e+00 3.333333333333333148e-01 1.600935643142084031e+00 > > 6.283185307179586232e+00 5.000000000000000000e-01 1.423247420534685892e+00 > > 6.283185307179586232e+00 6.666666666666666297e-01 1.265280855439646635e+00 > > 6.283185307179586232e+00 8.333333333333332593e-01 1.124847036463023642e+00 > > 6.283185307179586232e+00 1.000000000000000000e+00 1.000000000000000000e+00 > > > > > > > > How would you plot them in order to have a 2D-color plot where one can > > understand we are working on a circle (well, maybe it will look like > > something different since I have only a few grid points, but the aim > > is clear, I hope)? > > Kind Regards > > > > Lorenzo ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. 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