recreating mesh grid plot of polar formula

Hello,i want to recreate the photo shown bellow in matlab.

I have tried to build it as follows but i get a rectangular surface plot instead of circular.

Also i get my radian axis till 2000instead of 6.28.

how can i change my code to produce the circular plot?

Thanks.

a=0.819*10^(-3)
b=2.73*10^(-3)
Vo=15
rho=linspace(a,b,100)
t=2*pi*linspace(1,360,360)
func=Vo*(b/a)*(1./rho)
[rr,tt]=meshgrid(rho,t)
func_grid=Vo*(b/a)*(1./rr)
surf(rr,tt,func_grid)
shading interp

Answer 1

[Dyuman Joshi]

"Also i get my radian axis till 2000 instead of 6.28."

Because your data spans from 2*pi to 2*pi*360 (~2262) instead of 0 to 2*pi.

a=0.819*10^(-3);
b=2.73*10^(-3);
Vo=15;
rho=linspace(a,b,100);
%Updated t
t=linspace(0,2*pi,360);

[rr,tt]=meshgrid(rho,t);

func_grid=Vo*(b/a)*(1./rr);

%Modify the inputs to surf to obtain a polar plot
surf(rr.*sin(tt),rr.*cos(tt),func_grid)
shading interp
colorbar
%change view as per requirement
view(2)

[fima v]

Hello Dyaman, is there a way to add arrows in the gradient direction to this plot?

arrows going radially outwards.

Thanks.

[Dyuman Joshi]

It's not clear to me as to what the final output should be.

Could show you an example?

[fima v]

Hello Dyuman,i want to create a phot as shown bellow.the plot is in the gradient of the field direction

is it possible in Matlab?

Thanks.