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[求助]
求各位帅哥美女大神指点指点,matlab如何解方程 已有2人参与
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解方程:1-2*x/3-(1-x)^(2/3)=0.004846*t,t是一列数,如t=1,2,3,4,5..........,199,200. 我用x=solve(‘1-2*x/3-(1-x)^(2/3)=0.004846*t’,‘x’)解出来 x = 1.5 - 1.5*root(z^3 - (9*z^2)/4 - z*((21807*t)/1000000 - 3/2) + (7269*t)/1000000 - (52838361*t^2)/1000000000000 - 1/4, z, 1) - 0.007269*t 1.5 - 1.5*root(z^3 - (9*z^2)/4 - z*((21807*t)/1000000 - 3/2) + (7269*t)/1000000 - (52838361*t^2)/1000000000000 - 1/4, z, 2) - 0.007269*t 1.5 - 1.5*root(z^3 - (9*z^2)/4 - z*((21807*t)/1000000 - 3/2) + (7269*t)/1000000 - (52838361*t^2)/1000000000000 - 1/4, z, 3) - 0.007269*t 如果把t换成1倒是能得出结果 x = -0.21847788792997061292054124636069 0.19908864670058590163107860405944 1.1225822412293847112894626423012 我要的是中间这个结果,在0-1之间,怎样才能将一列t一次全部解出来,而且结果要中间这个0-1之间的,求大神指点,感激不尽@laosam280 |
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litiantao: 金币+40, ★★★很有帮助 2017-03-02 11:28:58
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litiantao: 金币+40, ★★★很有帮助 2017-03-02 11:28:58
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这是一个例子,可以看一下! function fidt i=1 for t=1:40 s=sprintf('1-2*x/3-(1-x)^(2/3)-0.004846*%f',t); y=solve(s,'x'); y=double(y); x(i)=y(0<y&y<1);i=i+1; end x 运行结果: x = Columns 1 through 7 0.1991 0.2758 0.3323 0.3784 0.4178 0.4525 0.4835 Columns 8 through 14 0.5117 0.5375 0.5614 0.5836 0.6043 0.6238 0.6421 Columns 15 through 21 0.6594 0.6758 0.6913 0.7061 0.7202 0.7336 0.7464 Columns 22 through 28 0.7587 0.7704 0.7817 0.7924 0.8028 0.8127 0.8222 Columns 29 through 35 0.8314 0.8402 0.8486 0.8568 0.8646 0.8721 0.8794 Columns 36 through 40 0.8863 0.8930 0.8995 0.9057 0.9116 但是有一个问题:如果有两个数在0,1之间选哪个,你在修改吧! |
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2楼2017-03-01 13:14:14
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{{1, 0.199089}, {2, 0.275789}, {3, 0.332326}, {4, 0.378414}, {5, 0.417815}, {6, 0.452461}, {7, 0.483499}, {8, 0.511676}, {9, 0.537512}, {10, 0.561385}, {11, 0.58358}, {12, 0.604319}, {13, 0.623778}, {14, 0.642101}, {15, 0.659406}, {16, 0.67579}, {17, 0.691337}, {18, 0.706119}, {19, 0.720196}, {20, 0.733622}, {21, 0.746444}, {22, 0.758703}, {23, 0.770435}, {24, 0.781674}, {25, 0.792447}, {26, 0.802783}, {27, 0.812703}, {28, 0.822231}, {29, 0.831385}, {30, 0.840183}, {31, 0.848641}, {32, 0.856775}, {33, 0.864599}, {34, 0.872124}, {35, 0.879363}, {36, 0.886327}, {37, 0.893026}, {38, 0.899468}, {39, 0.905663}, {40, 0.911619}, {41, 0.917343}, {42, 0.922842}, {43, 0.928122}, {44, 0.93319}, {45, 0.938051}, {46, 0.942711}, {47, 0.947173}, {48, 0.951443}, {49, 0.955525}, {50, 0.959422}, {51, 0.963137}, {52, 0.966674}, {53, 0.970036}, {54, 0.973225}, {55, 0.976243}, {56, 0.979091}, {57, 0.981771}, {58, 0.984284}, {59, 0.98663}, {60, 0.988808}, {61, 0.990818}, {62, 0.992658}, {63, 0.994324}, {64, 0.995812}, {65, 0.997115}, {66, 0.998221}, {67, 0.999111}, {68, 0.99975}, {69, 0.999999}} |
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6楼2017-03-01 17:09:48
wurongjun
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