R语言学习记录-图形篇
1.坐标轴坐标方向
**las **represents the style of axis labels.
(0=parallel, 1=all horizontal, 2=all perpendicular to axis, 3=all vertical)
plot(x,y,las=1)2.生成一些列的颜色
>cm.colors(10, alpha = 1)
[1] "#80FFFFFF" "#99FFFFFF" "#B2FFFFFF" "#CCFFFFFF" "#E6FFFFFF" "#FFE6FFFF"
[7] "#FFCCFFFF" "#FFB2FFFF" "#FF99FFFF" "#FF80FFFF"
>rainbow(n, s = 1, v = 1, start = 0, end = max(1, n - 1)/n, alpha = 1)
>heat.colors(n, alpha = 1)
>terrain.colors(n, alpha = 1)
>topo.colors(n, alpha = 1)
>cm.colors(n, alpha = 1)- 画颜色梯度条
library(RColorBrewer)
color.bar <- function(lut, min, max=-min, nticks=11, ticks=seq(min, max, len=nticks), title='')
{
scale = (length(lut)-1)/(max-min)
dev.new(width=1.75, height=5)
plot(c(0,10), c(min,max), type='n', bty='n', xaxt='n', xlab='', yaxt='n', ylab='', main=title)
axis(2, ticks, las=1)
for (i in 1:(length(lut)-1)) {
y = (i-1)/scale + min rect(0,y,10,y+1/scale, col=lut[i], border=NA)
}
}
color.bar(colorRampPalette(c("light green", "yellow", "orange", "red"))(100), -1)http://stackoverflow.com/questions/9314658/colorbar-from-custom-colorramppalette</code>
http://www.colbyimaging.com/wiki/statistics/color-bars </blockquote>
4.多个图形置于一张图
par(mfrow=c(2,2))5.Text and Symbol Size
| option | description |
| cex | number indicating the amount by which plotting text and symbols should be scaled relative to the default. 1=default, 1.5 is 50% larger, 0.5 is 50% smaller, etc. |
| cex.axis | magnification of axis annotation relative to cex |
| cex.lab | magnification of x and y labels relative to cex |
| cex.main | magnification of titles relative to cex |
| cex.sub | magnification of subtitles relative to cex |
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http://blog.revolutionanalytics.com/2009/01/10-tips-for-making-your-r-graphics-look-their-best.html
