Mathematica 作图,f[x_] = -8.12042635*CDF[NormalDistribution[],Subscript[z,1]] + CDF[NormalDistribution[],Subscript[z,2]]*7.7929053483224/(1 - x) + 1.32752101Subscript[z,1] = 0.323875632 + 4*Ln[1 - x]Subscript[z,2] = 0.0738756 + 4*Ln[1 - x]Plot[f[x]

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Mathematica 作图,f[x_] = -8.12042635*CDF[NormalDistribution[],Subscript[z,1]] + CDF[NormalDistribution[],Subscript[z,2]]*7.7929053483224/(1 - x) + 1.32752101Subscript[z,1] = 0.323875632 + 4*Ln[1 - x]Subscript[z,2] = 0.0738756 + 4*Ln[1 - x]Plot[f[x]

Mathematica 作图,f[x_] = -8.12042635*CDF[NormalDistribution[],Subscript[z,1]] + CDF[NormalDistribution[],Subscript[z,2]]*7.7929053483224/(1 - x) + 1.32752101Subscript[z,1] = 0.323875632 + 4*Ln[1 - x]Subscript[z,2] = 0.0738756 + 4*Ln[1 - x]Plot[f[x]
Mathematica 作图,
f[x_] = -8.12042635*CDF[NormalDistribution[],Subscript[z,1]] +
CDF[NormalDistribution[],Subscript[z,
2]]*7.7929053483224/(1 - x) + 1.32752101
Subscript[z,1] = 0.323875632 + 4*Ln[1 - x]
Subscript[z,2] = 0.0738756 + 4*Ln[1 - x]
Plot[f[x],{x,0,0.1}]
可是图形一直就只有坐标轴啊.这是为什么呢?
小弟我初学Mathematica,很多语言都还不会.
论文就差这一步了!
换成Log试过了,还是不行啊?
是哪里的问题呢?

Mathematica 作图,f[x_] = -8.12042635*CDF[NormalDistribution[],Subscript[z,1]] + CDF[NormalDistribution[],Subscript[z,2]]*7.7929053483224/(1 - x) + 1.32752101Subscript[z,1] = 0.323875632 + 4*Ln[1 - x]Subscript[z,2] = 0.0738756 + 4*Ln[1 - x]Plot[f[x]
我只把你的命令中的Ln改成Log就能运行,而且能出图,图像如下,
计算结果:
1.32752 + (3.89645 (1 + Erf[(0.0738756 + 4 Log[1 - x])/Sqrt[2]]))/(
 1 - x) - 4.06021 (1 + Erf[(0.323876 + 4 Log[1 - x])/Sqrt[2]])
0.323876 + 4 Log[1 - x]
0.0738756 + 4 Log[1 - x]

f[x_] = -8.12042635*CDF[NormalDistribution[], Subscript[z, 1]] +
CDF[NormalDistribution[],
Subscript[z, 2]]*7.7929053483224/(1 - x) + 1.32752101
Subscript[z, 1] = 0.323875632 + 4*L...

全部展开

f[x_] = -8.12042635*CDF[NormalDistribution[], Subscript[z, 1]] +
CDF[NormalDistribution[],
Subscript[z, 2]]*7.7929053483224/(1 - x) + 1.32752101
Subscript[z, 1] = 0.323875632 + 4*Log[1 - x]
Subscript[z, 2] = 0.0738756 + 4*Log[1 - x]
Plot[f[x], {x, 0, 0.1}]
你把Log写成Ln了,因为这里没有Ln这个命令啊!

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