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use ContourPlot to draw implicit function graphics
使用ContourPlot 画隐函数图像
for example $x^{3}+y^{3}-3xy=0$
use ContourPlot to draw integral curve
使用ContourPlot 画积分曲线
for example $y{}‘=xy-e^{-x^{2}}y^{3}$
solve it get $y=\frac{e^{x^{2}/2}}{\sqrt{2x+c}},y=-\frac{e^{x^{2}/2}}{\sqrt{2x+c}}$
then get $c=\frac{e^{x^{2}}}{y^{2}}-2x$
then ContourPlot[$c=\frac{e^{x^{2}}}{y^{2}}-2x$,$\left \{ x,-3,3 \right \}$,$\left \{ y,-3,3 \right \}$]
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原文地址:http://www.cnblogs.com/xyzxyzxyzxyzxz/p/4967161.html