How to draw irregular curve using random data ?

How to draw irregular Circle/ Curve in MATLAB with radius(i.e 5) varying from +- 1

For example I have to make something like this

Answer 1

[Matt J]

t=pi/180*(0:10:360);
r=5+0.5*(rand(size(t))*2-1); 
  r(end)=r(1);

tq=linspace(t(1),t(end),1000);
rq=spline(t,[0,r,0],tq);

[x,y]=pol2cart(tq, rq);

plot(x,y); axis equal

[Kushagra Kirtiman]

Can you please give me a brief explanation so that I can understand it?

[Matt J]

It starts with polar coordinates t,r where r =5 +/- random perturbation.

Then spline() is used to interpolate smoothly between them.

Then pol2cart() is used to convert to Cartesian x,y coordinates which are plotted as usual.