matlab 做积分函数曲线函数如图: 想画出此函数曲线 r为横轴 自己写了一个 不对 求改正x=0:0.01:15;mu=0;b=1;s=1;b0=b.^2;d0=s.^2;f0=@(z)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));f1=quad(f0,0,inf);f
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![matlab 做积分函数曲线函数如图: 想画出此函数曲线 r为横轴 自己写了一个 不对 求改正x=0:0.01:15;mu=0;b=1;s=1;b0=b.^2;d0=s.^2;f0=@(z)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));f1=quad(f0,0,inf);f](/uploads/image/z/3933618-42-8.jpg?t=matlab+%E5%81%9A%E7%A7%AF%E5%88%86%E5%87%BD%E6%95%B0%E6%9B%B2%E7%BA%BF%E5%87%BD%E6%95%B0%E5%A6%82%E5%9B%BE%EF%BC%9A+%E6%83%B3%E7%94%BB%E5%87%BA%E6%AD%A4%E5%87%BD%E6%95%B0%E6%9B%B2%E7%BA%BF+r%E4%B8%BA%E6%A8%AA%E8%BD%B4+%E8%87%AA%E5%B7%B1%E5%86%99%E4%BA%86%E4%B8%80%E4%B8%AA+%E4%B8%8D%E5%AF%B9+%E6%B1%82%E6%94%B9%E6%AD%A3x%3D0%3A0.01%3A15%3Bmu%3D0%3Bb%3D1%3Bs%3D1%3Bb0%3Db.%5E2%3Bd0%3Ds.%5E2%3Bf0%3D%40%28z%29%281.%2Fz%29.%2Aexp%28-%28%28log%28z%29+-+mu%29.%5E2.%2F%282%2Ad0%29%29-%28%28%28x.%5E2%29%2B%28z.%5E2%29%29.%2F+%282%2Ab0%29%29%29%3Bf1%3Dquad%28f0%2C0%2Cinf%29%3Bf)
matlab 做积分函数曲线函数如图: 想画出此函数曲线 r为横轴 自己写了一个 不对 求改正x=0:0.01:15;mu=0;b=1;s=1;b0=b.^2;d0=s.^2;f0=@(z)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));f1=quad(f0,0,inf);f
matlab 做积分函数曲线
函数如图:
想画出此函数曲线 r为横轴
自己写了一个 不对 求改正
x=0:0.01:15;
mu=0;
b=1;
s=1;
b0=b.^2;
d0=s.^2;
f0=@(z)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));
f1=quad(f0,0,inf);
f=(f1.*x)./(b0.*sqrt(2*pi*d0));
plot(x,f);
matlab 做积分函数曲线函数如图: 想画出此函数曲线 r为横轴 自己写了一个 不对 求改正x=0:0.01:15;mu=0;b=1;s=1;b0=b.^2;d0=s.^2;f0=@(z)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));f1=quad(f0,0,inf);f
1、quad的积分表达式中
2、quad的积分限不能为无穷大,换用integral函数(2012a以上版本).
把
f0=@(z)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));
f1=quad(f0,0,inf);
改成
f0=@(z,x)(1./z).*exp(-((log(z) - mu).^2./(2*d0))-(((x.^2)+(z.^2))./ (2*b0)));
f1=arrayfun(@(x)integral(@(z)f0(z,x),0,inf),x);