Matlab Error using ==> plot Conversion to double from sym is not possible.clearx=0:0.1:1;syms a;B=2*int((-x*sin(a)+1)./(1+(x.^2)-2*x*cos(a)).^1.5,a,0,pi);plot(x,B)运行后就出现?Error using ==> plotConversion to double from sym is not possible.
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