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如何隨機將值添加到矩陣?將值隨機添加到矩陣
說我有:
mat <- matrix(0, 10, 10)
v = 5
我怎麼能隨意v一次添加到墊,2個位置?輸出應該是這樣的一個迭代後:
out
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] 0 0 0 0 0 0 0 0 0 0
[2,] 5 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0
[4,] 0 0 0 0 5 0 0 0 0 0
[5,] 0 0 0 0 0 0 0 0 0 0
[6,] 0 0 0 0 0 0 0 0 0 0
[7,] 0 0 0 0 0 0 0 0 0 0
[8,] 0 0 0 0 0 0 0 0 0 0
[9,] 0 0 0 0 0 0 0 0 0 0
[10,] 0 0 0 0 0 0 0 0 0 0
另一次迭代後,墊應該有2個位置在「V」填充值
謝謝,這個工程很好 – user3067923