用OpenGL从矩阵绘制热图的最有效方法? [英] Most efficient way of drawing a heatmap from matrix with OpenGL?

问题描述

假定一个整数值的矩阵m:

Assume a matrix m of integer values:

m <- matrix(sample(1:10, 100, replace = TRUE), nrow = 10)

给出一个将这些值从1到10映射为某些颜色的调色板，如何在R中使用OpenGL图形将矩阵m显示为热图，例如使用rgl包? (最好以最有效的方式.)

Given a colour palette that maps those values from 1 to 10 to some colours, how to show matrix m as a heatmap in R with OpenGL graphics, e.g. using the rgl package? (Preferably in the most efficient way.)

推荐答案

非常彻底的答案

The very thorough answer here suggests this may not be what you want; you might want to try the solution below against the other solutions benchmarked there. Nonetheless:

设置数据和颜色图

set.seed(101)
library(viridisLite)
vv <- viridis(10)
m <- matrix(sample(1:10, 100, replace = TRUE), nrow = 10)

绘制图片:

library(rgl)
view3d(theta=0, phi=0)  ## head-on view
par3d(zoom=0.7)         ## (almost) fill window
surface3d(x = 1:10, y = 1:10, z = matrix(0, 10,10), 
          color = vv[m],
          smooth=FALSE, lit=FALSE  ## turn off smoothing/lights
 )

您可能需要在两个表面之间使用pop3d()来清除前一个表面...

You may need to use pop3d() between surfaces to clear the previous surface ...

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