如何在R中创建具有两个因子和一个数值数据类型的热图？

Question

Consider the following scenario :- 考虑以下情形：

       Col1 Col2 Col3

Col1 & Col2 are belongs to character data type. Col1和Col2属于字符数据类型。 Col3 is the numeric data type. Col3是数字数据类型。

Each value in Col3 denotes the combinational behavior of Col1 & Col2. Col3中的每个值表示Col1和Col2的组合行为。

So, I want to create a data matrix of size (Col1 * Col2) and stores the col3 value accordingly. 因此，我想创建一个大小为（Col1 * Col2）的数据矩阵，并相应地存储col3值。

I would be really happy, If someone could help me on this..... 如果有人可以帮助我，我将非常高兴.....

Answer 1

You can use functions from data.table package 您可以使用data.table包中的函数

data <- data.table(a = c('a', 'b', 'c', 'a'), b = c('d', 'e', 'f', 'e'), c = c(3,5,6,7))
casted <- dcast(data, a~b, value.var = 'c')

If you need matrix as a result, you have to do additional conversion: 如果结果需要矩阵，则必须执行其他转换：

matr <- as.matrix(casted[, 2:ncol(casted), with = F])
rownames(matr) <- casted[[1]]