用matlab做双重积分时,老是错误.G = @(x,y)(tan(x.^2+y.^2))/(1+x+y); I = dblquad(G,0,pi/2,0,pi/3);

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用matlab做双重积分时,老是错误.G = @(x,y)(tan(x.^2+y.^2))/(1+x+y); I = dblquad(G,0,pi/2,0,pi/3);
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用matlab做双重积分时,老是错误.G = @(x,y)(tan(x.^2+y.^2))/(1+x+y); I = dblquad(G,0,pi/2,0,pi/3);
用matlab做双重积分时,老是错误.G = @(x,y)(tan(x.^2+y.^2))/(1+x+y); I = dblquad(G,0,pi/2,0,pi/3);

用matlab做双重积分时,老是错误.G = @(x,y)(tan(x.^2+y.^2))/(1+x+y); I = dblquad(G,0,pi/2,0,pi/3);
G = @(x,y)(tan(x.^2+y.^2))./(1+x+y); I = quad2d(G,0,pi/2,0,pi/3)
Warning:Reached the maximum number of function evaluations (2000).The result fails
the global error test.
> In quad2d at 248
I =
0.3324
G = @(x,y)(tan(x.^2+y.^2))./(1+x+y); I = dblquad(G,0,pi/2,0,pi/3)