matlab中对于 f=1/(3*((1-x)*x^0.5)^2.2该函数的数值积分问题>> quad('1/(3*((1-x)*x^0.5)^2.2)',1,10)Error using ==> inlineeval at 15Error in inline expression ==> 1/(3*((1-x)*x^0.5)^2.2)Matrix must be square.Error in ==> inline.subsref at 27
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![matlab中对于 f=1/(3*((1-x)*x^0.5)^2.2该函数的数值积分问题>> quad('1/(3*((1-x)*x^0.5)^2.2)',1,10)Error using ==> inlineeval at 15Error in inline expression ==> 1/(3*((1-x)*x^0.5)^2.2)Matrix must be square.Error in ==> inline.subsref at 27](/uploads/image/z/8693101-37-1.jpg?t=matlab%E4%B8%AD%E5%AF%B9%E4%BA%8E+f%3D1%2F%283%2A%28%281-x%29%2Ax%5E0.5%29%5E2.2%E8%AF%A5%E5%87%BD%E6%95%B0%E7%9A%84%E6%95%B0%E5%80%BC%E7%A7%AF%E5%88%86%E9%97%AE%E9%A2%98%3E%3E+quad%28%271%2F%283%2A%28%281-x%29%2Ax%5E0.5%29%5E2.2%29%27%2C1%2C10%29Error+using+%3D%3D%3E+inlineeval+at+15Error+in+inline+expression+%3D%3D%3E+1%2F%283%2A%28%281-x%29%2Ax%5E0.5%29%5E2.2%29Matrix+must+be+square.Error+in+%3D%3D%3E+inline.subsref+at+27)
matlab中对于 f=1/(3*((1-x)*x^0.5)^2.2该函数的数值积分问题>> quad('1/(3*((1-x)*x^0.5)^2.2)',1,10)Error using ==> inlineeval at 15Error in inline expression ==> 1/(3*((1-x)*x^0.5)^2.2)Matrix must be square.Error in ==> inline.subsref at 27
matlab中对于 f=1/(3*((1-x)*x^0.5)^2.2该函数的数值积分问题
>> quad('1/(3*((1-x)*x^0.5)^2.2)',1,10)
Error using ==> inlineeval at 15
Error in inline expression ==> 1/(3*((1-x)*x^0.5)^2.2)
Matrix must be square.
Error in ==> inline.subsref at 27
INLINE_OUT_ = inlineeval(INLINE_INPUTS_,INLINE_OBJ_.inputExpr,INLINE_OBJ_.expr);
Error in ==> quad at 77
y = f(x,varargin{:});
用quad求总是出现问题,比如
>> quad('exp(-x)',1,2.5)
ans =
0.285794449331167
怎么求上面的数值积分?
quad('1./(3.42e-9.*(112.027.*(1-1.36.*(-0.0345.*x+0.38475).^0.1.*x./35).*x.^0.5).^2.254)',0.5,15)
ans =
2.9492e+004 +1.6559e+003i
按照第二位回答者的方法,解出来的竟然是复数,希望能解决下
matlab中对于 f=1/(3*((1-x)*x^0.5)^2.2该函数的数值积分问题>> quad('1/(3*((1-x)*x^0.5)^2.2)',1,10)Error using ==> inlineeval at 15Error in inline expression ==> 1/(3*((1-x)*x^0.5)^2.2)Matrix must be square.Error in ==> inline.subsref at 27
quad('1./(3.*((1-x).*x.^0.5).^2.2)',1,10)
注意./ .* .^和.* /的使用方法.
不过这个结果好像不怎么正常.