参数方程曲线绘制用ParametricPlot函数.
y[x_] := x + 9.81/2*x*x;
k = 1;
X[x_] := x - k*y'[x]/(1 + (y'[x])^2)^0.5;
Y[x_] := y[x] + k/(1 + (y'[x])^2)^0.5;
ParametricPlot[{X[x], Y[x]}, {x, 0, 2}, AspectRatio->1]
你运行下看是不是你想要的?
参数方程曲线绘制用ParametricPlot函数.
y[x_] := x + 9.81/2*x*x;
k = 1;
X[x_] := x - k*y'[x]/(1 + (y'[x])^2)^0.5;
Y[x_] := y[x] + k/(1 + (y'[x])^2)^0.5;
ParametricPlot[{X[x], Y[x]}, {x, 0, 2}, AspectRatio->1]
你运行下看是不是你想要的?