mathematica中作隐函数图像的问题

Question

In[9]:= In[1] := << Graphics' ImplicitPlot'In[2] := ImplicitPlot[x^2 + y^2 == 1, {x, -2, 2}] During evaluation of In[9]:= SetDelayed::write: Tag In in In[1] is Protected. >> Out[9]= $Failed During evaluation of In[9]:= SetDelayed::write: Tag In in In[2] is Protected. >> Out[10]= $Failed

Answer 1

你的命令都写错了，应该是这样吧： << Graphics`ImplicitPlot`; ImplicitPlot [x^2 + y^2 == 1, {x, -2, 2}] 注意`是esc键附近的那个键上的符号，还有Graphics与`ImplicitPlot`;之间没有空格。