我想拆分一列中的所有数字。
数字： 123456789012
成为 123-4567890-12
-所以我想在位置 4 和 10 处添加。
我不想创建新专栏
我有一个向量，我想将其转换为概率密度函数。平均值是 1。我该如何绘制它？
向量：
x <-
c(0.7601401, 0.8607037, 0.8748152, 0.885415, 0.8904619, 0.899021,
0.9034128, 0.9050411, 0.9093876, 0.9141021, 0.9172803, 0.9209636,
0.9238607, 0.9268591, 0.9293789, 0.9313833, 0.9335163, 0.9360798,
0.9406245, 0.9427261, 0.9441703, 0.9473808, 0.9502454, 0.9518683,
0.9540568, 0.955987, 0.9580035, 0.9617511, 0.9635325, 0.964507,
0.9674928, 0.9692979, 0.9705296, 0.9732977, 0.9754498, 0.977204,
0.9793093, 0.9821249, 0.9841156, 0.9864521, 0.9873941, 0.9883275,
0.9904071, 0.9920552, 0.9946789, 0.9967097, 0.997695, 0.9992215,
1.001643, 1.0038606, 1.006269, 1.0077312, 1.0091087, 1.0100767,
1.0113615, 1.0124576, 1.0154025, 1.017386, 1.0189122, 1.021932,
1.0238598, 1.0258631, 1.0273012, 1.0294901, 1.031085, 1.0336801,
1.0371085, 1.0387533, 1.0406862, 1.0436292, 1.0453442, 1.0471563,
1.0514885, 1.0531803, 1.055339, …