Error on contour plot stability region Runngekutta
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Janvier Solaris
le 10 Nov 2017
Commenté : Walter Roberson
le 11 Nov 2017
Hello I am trying to plot a region of stability of the Runge Kutta 4th order here is the following code in a script
[X,Y] = meshgrid(-5:0.01:5,-5:0.01:5);
Mu = X+i*Y;
R = 1 + Mu + .5*Mu.^2 + (1/6)*Mu.^3 + (1/24)*Mu.^4;
Rhat = abs(R);
contourplot(X,Y,Rhat,[1]);
I get the error that contourplot is an undefined function. the contour plot should look like this :
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/169478/image.jpeg)
Any help would be appreciated
0 commentaires
Réponse acceptée
Walter Roberson
le 10 Nov 2017
contourplot() is not a function defined by Mathworks, and it does not appear to be defined by any File Exchange contributions either.
The contour() routine provided by MATLAB would only draw outlines. The contourf() routine would fill those outlines, but with constant colors, not with a shaded surface like that.
2 commentaires
Walter Roberson
le 11 Nov 2017
I would suggest
surf(X, Y, Rhat, 'edgecolor', 'none');
colormap(gray(256))
lighting gouraud
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Contour Plots dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!