Re: 3 D plot

[Thomas D. Dean]

On 03/15/12 03:18, Doug Stewart wrote:

> N=10;
> niter = 6182;
> tmax=55;
> l=400*10^-4;
> r= 1.85*10^-4;% in cm
> d = 2*r; % in cm
>
> Ri=333.33;% ohms.cm <http://ohms.cm>
> Cm = 1*(10^-6); % farad / cm^2
> Rm = 20000;% ohms.cm <http://ohms.cm>^2
> tau = ((Rm*10^-3)*Cm*10^6);% msec
> f= 1/(2*pi*tau*(10^-3)); % Hz
> lambda = (1/2)*(d/(pi*f*Ri*Cm))^(1/2);%cm
>
> vvvv=randn(niter,N);
> x= linspace(0,tmax,niter);
> z = linspace(0,(l/lambda),N);
> y = vvvv(1,:);
> [xx,zz,yy]= meshgrid(x,z,y);
> mesh(xx,zz,yy)
>
> If you plot a constant then you plot will be all one color and have no
> height!
> DAS

I get an error from this.  Octave 3.6.1

...
mesh(xx,zz,yy)
error: invalid value for array property "xdata"
error: called from:
error:/usr/local/share/octave/3.6.1/m/plot/surface.m atline159, column 7
error:/usr/local/share/octave/3.6.1/m/plot/surface.m atline 51,column 23
error: /usr/local/share/octave/3.6.1/m/plot/mesh.m at line 47, column 7