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土虫

[求助] 关于matlab画图!重赏!

[m1,m2,m3,m4,m5,m6,m7,m8,m11,m12,m13,m14,m21,m22,m31,m32,m33,m34]=dsolve('Dm1=m11-m1','Dm2=m1-m2','Dm3=m2-m3','Dm4=m3-m4','Dm5=m4-m5','Dm6=m5-m6','Dm7=m6-m7','Dm8=m22-m8','Dm11=m6-m11','Dm12=m11-m2','Dm13=m2-m4','Dm14=m4-m6','Dm21=m22-m1','Dm22=m1-m22','Dm31=m7-m8','Dm32=m8-m3','Dm33=m3-m5','Dm34=m5-m7','t')


matlab里解以上方程组,得到m1 = 5*Sum(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*exp(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*t)*C[_a],_a = 1 .. 6)+C12+Sum(exp(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*t)*C[_a],_a = 1 .. 6)+10*Sum(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)^3*exp(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*t)*C[_a],_a = 1 .. 6)+10*Sum(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)^2*exp(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*t)*C[_a],_a = 1 .. 6)+5*Sum(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)^4*exp(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*t)*C[_a],_a = 1 .. 6)+Sum(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)^5*exp(RootOf(7+21*_Z+35*_Z^2+35*_Z^3+21*_Z^4+7*_Z^5+_Z^6,index = _a)*t)*C[_a],_a = 1 .. 6)

m2=……
……


请问如何将m1和t 的关系图画出来?用plot画的时候提示plot(m1,t)
??? Error using ==> plot
Conversion to double from sym is not possible.请问我如何画,重赏!!
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土虫

对应一个t,m应该都有一个值?但是上面那些_Z根本解不了

对应一个t,m应该都有一个值?但是上面那些_Z根本解不了
3楼2007-12-27 14:20:30
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dnp

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小木虫浪子

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这样肯定是不行的,因为matlab中画图的话必须得取值才能画出来。所以就看你想画什么样的图,准确地说是你想画坐标范围多大的图。
所以你可以对t取一系列连续的值,如 t=0.01:0.01:1,有1000个点,然后求出每个点下的m值,然后再plot(t,m)即可。这里你可以扩大t的取值范围。
What would Jesus do?
2楼2007-12-27 13:34:43
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