n9d https://blog.hatena.ne.jp/n9d/ 計算機と戯れる日々 https://n9d.hatenadiary.org/ maximaで球を表示するには媒介変数表示を使う追記 2008/10/14 11:37:25: 次の一行でかけた plot3d([cos(x)*cos(y),cos(x)*sin(y),sin(x)],[x,-%pi,%pi],[y,-%pi,%pi]);もと (%i1) aa1: cos(u)*cos(v)$ (%i2) aa2: cos(u)*sin(v)$ (%i3) aa3: sin(u)$ (%i4) plot3d ([aa1,aa2,aa3],[u,0,%pi*2],[v,0,%pi*2] ,['grid, 60, 60]); 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fn9d.hatenadiary.org%2Fentry%2F20081012%2F1223827221" title="maximaで球を表示する - 計算機と戯れる日々" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> https://cdn-ak.f.st-hatena.com/images/fotolife/n/n9d/20081013/20081013010002.png Hatena Blog https://hatena.blog 2008-10-12 01:00:21 rich https://n9d.hatenadiary.org/entry/20081012/1223827221 1.0 100%