R语言学习——矩阵

1 创建矩阵 a = matrix(c(1,2,3,4,5,6)) b = matrix(c(1,2,3,4,5,6),nrow=2,ncol=3) c = matrix(c(1,2,3,4,5,6),nrow=2,ncol=3,byrow=T) d = matrix(c(1,2,3,4,5,6),nrow=2,ncol=3,byrow=F) 注： nrow：指定行数，默认值 1 ncol：指定列

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