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plot是R中的基本画图工具,直接plot(x),x为一个数据集,就能画出图。细节往往制胜的关键,所以就详细来看下plot的所有可设置参数及参数设置方法。
下面讲到的图形参数,是graphic包中的常见参数,graphic不同图形方法中,这些参数都是相同的。
1、符号和线条
pch指定图形(在type=”p”/”o”/”b”时)
可加cex参数,用来控制图中的符号大小,默认为cex=1
当PCH为21-25时,应指定参数“col =”和“bg =”。PCH也可以是字符,例如“#”,“%”,“A”,“a”,并且字符将被绘制
lty指定线形
lwd改变线条粗细
2、type图形的类型
“p”点图
“l”线图
“b”点线图,线不穿过点
“c”虚线图
“o”点线图,线穿过点
“h”直方图
“s”阶梯图
“S”步骤图
“n”无图
x
png("~/plotSamples.png",width=9,height=9,unit="in",res=108)
#在工作目录下创建plotSamples.png图
par(mfcol=c(3,3))
plot(x,