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参考 R言語
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| ``` | |
| # 行列を作成 | |
| matrix(c(1, 2, 3, 4), nrow = 2) # 引数nrowで行列の行数を指定 | |
| matrix(c(1, 2, 3, 4), nrow = 2, byrow = TRUE) # 引数byrowでTRUEを指定すると、数字の配置が換わる（要注意） | |
| # 変数に行列を代入 | |
| m1 <- matrix(c(12, 17, 22, 16), nrow = 2) | |
| # 代入結果を確認 | |
| m1 | |
| # 行列の行数や列数を確認 | |
| nrow(m1) | |
| ncol(m1) | |
| dim(m1) | |
| ``` |
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