現在有個矩陣
A=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ......]
想要把它有規律的變成
[3 4 5 8 9 10 13 14 15.....]
也就是把每五項中的前兩項刪掉
要怎麼弄阿試了好幾次都不行
謝謝
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