豆粑粑 matlab 在圆形的区域内contourf，再挖掉一部分
别人的问题，在一个圆里面画contourf的图，再挖去一块。
http://www.ilovematlab.cn/forum.php?mod=viewthread&tid=508822&page=1&extra=#pid3221245
clear all
clc
clf
=peaks(40);
r_big=linspace(0,3,400);
the=linspace(0,2*pi,720);
the=;
=meshgrid(r_big,the);
X_cir_big=R_big.*cos(The);
Y_cir_big=R_big.*sin(The);
Z_cir_big=griddata(x(:),y(:),z(:),X_cir_big,Y_cir_big);
Cir_big_x =r_big(end)*cos(the);
Cir_big_y =r_big(end)*sin(the);
r_sma=0.9;
cen_x=-1.7;
cen_y=0.3;
Cir_sma_x =r_sma*cos(the)+cen_x;
Cir_sma_y =r_sma*sin(the)+cen_y;
ind=((X_cir_big-cen_x).^2+(Y_cir_big-cen_y).^2)<r_sma^2;
% X_cir_big(ind)=nan;
% Y_cir_big(ind)=nan;
Z_cir_big(ind)=nan;
hold on
% surf(X_cir_big,Y_cir_big,Z_cir_big,'edgecolor','none');
=contourf(X_cir_big,Y_cir_big,Z_cir_big,20,'linecolor','k','linestyle','--');
clabel(C,'fontSize',8)
colorbar
plot(Cir_big_x,Cir_big_y,'k','linewidth',1)
plot(Cir_sma_x,Cir_sma_y,'k','linewidth',1)
axis equal
axis off
colormap(jet)
h=gcf;
fi_na=['./fig_cont_2D'];
fun_work_li_035_myfig_out(h,fi_na,3);
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