用mathematica画出z=sin(x^2+y^2)在-5
问题描述：
用mathematica画出z=sin(x^2+y^2)在-5
答
Plot3D[Sin@(x^2 + y^2),{x,-5,5},{y,-5,5},PlotPoints -> 40]ContourPlot[Sin@(x^2 + y^2),{x,-5,5},{y,-5,5},PlotPoints -> 40]DensityPlot[Sin@(x^2 + y^2),{x,-5,5},{y,-5,5},PlotPoints -> 40]要是觉得出图质量...