https://gewutang.cn/tags/%E5%9C%86/Recent content in 圆 on 格物堂Hugo -- gohugo.iozh-cnWed, 03 Aug 2011 00:00:00 +0000https://gewutang.cn/2011/08/03/a-powerful-tool-to-draw-circle-with-r/Wed, 03 Aug 2011 00:00:00 +0000https://gewutang.cn/2011/08/03/a-powerful-tool-to-draw-circle-with-r/<p>R用户经常要在图形中绘圆，如果你是其中的一员的话，你就不得不了解一下plotrix包中的draw.circle()函数。draw.circle()函数的优点有：</p> <ul> <li>任意指定位置</li> <li>随意设定圆内的颜色</li> <li>随意设定圆的线型</li> <li>随意设定圆线的颜色</li> </ul> <pre><code class="language-r">library(plotrix) plot(1:5,seq(1,10,length=5),type=&quot;n&quot;,xlab=&quot;&quot;,ylab=&quot;&quot;,main=&quot;Test draw.circle()&quot;) draw.circle(2,4,c(1,0.66,0.33),border=&quot;purple&quot;, col=c(&quot;#ff00ff&quot;,&quot;#ff77ff&quot;,&quot;#ffccff&quot;),lty=1,lwd=1) draw.circle(2.5,8,0.6,border=&quot;red&quot;,lty=3,lwd=3) draw.circle(4,3,0.7,border=&quot;green&quot;,lty=1,lwd=1) draw.circle(3.5,7,0.8,border=&quot;blue&quot;,lty=2,lwd=2) </code></pre> <img src="https://gewutang.cn/2011/08/03/a-powerful-tool-to-draw-circle-with-r/index_files/figure-html/unnamed-chunk-1-1.png" width="672" />