生成一个序列，它是 R 中另一个向量的递增部分 [英] Generate a sequence which is an increasing part of another vector in R

问题描述

首先，对不起标题.我试图找到一个合适的标题.
我的问题"是我有一个向量，比如说 1-5，我想从中创建一个新的向量.哪去了
1, 1,2 , 1,2,3, 1,2,3,4, 1,2,3,4,5

First of all, sorry for the title. i tried to find an appropriate title.
My "problem" is that I have a vector, say 1-5 from which I would like to make a new vector. Which goes
1, 1,2 , 1,2,3, 1,2,3,4, 1,2,3,4,5

因此，对于每一轮，从基线向量开始包含一个新数字，直到它到达终点.我有一种感觉应该可以使用 seq ...

So for each round in includes one new number from the baseline vector until it reaches the end. I have a feeling it should be possible with seq...

推荐答案

参见 ?sequence(来自手册页):

See ?sequence (from the manpage):

对于 nvec 的每个元素，都会创建序列 seq_len(nvec[i]).将这些连接起来并返回结果.

For each element of nvec the sequence seq_len(nvec[i]) is created. These are concatenated and the result returned.

示例:

sequence(1:5)
[1] 1 1 2 1 2 3 1 2 3 4 1 2 3 4 5

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