命令行实用程序打印linux中的数字统计 [英] command line utility to print statistics of numbers in linux

问题描述

我经常发现一个文件每行有一个数字。我最后在excel中导入它来查看像中位数，标准偏差等等。

I often find myself with a file that has one number per line. I end up importing it in excel to view things like median, standard deviation and so forth.

在linux中有命令行实用程序做同样吗？我通常需要找到平均值，中位数，最小值，最大值和std偏差。

Is there a command line utility in linux to do the same? I usually need to find the average, median, min, max and std deviation.

推荐答案

一个如下所示的文件：

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b $ b

使用：

Use this:

R -q -e "x <- read.csv('nums.txt', header = F); summary(x); sd(x[ , 1])"

得到这个：

       V1       
 Min.   : 1.00  
 1st Qu.: 3.25  
 Median : 5.50  
 Mean   : 5.50  
 3rd Qu.: 7.75  
 Max.   :10.00  
[1] 3.02765

编辑添加几个澄清的评论回到这里，不记得一些理由）：

Edit to add a couple of clarifying comments (because I came back to this and didn't remember some of the rationale):

• -q flag squelling R's startup licensing and help output


• -e 标志告诉R你将传递一个表达式


• x 是一个 data.frame 它是一个容纳多个向量/列数据的结构，如果你只是在一个向量中读取，这是一个有点奇怪。


• 某些函数，如 summary（），自然包含 data.frames 。如果 x 有多个字段， summary（）将为每个字段提供上述描述性统计信息。


• 但是 sd（）每次只能使用一个向量，这就是为什么我索引 x 对于该命令（ x [，1] 返回 x 的第一列）。您可以使用 apply（x，MARGIN = 2，FUN = sd）来获取所有列的SD。

• The -q flag squelches R's startup licensing and help output
• The -e flag tells R you'll be passing an expression from the terminal
• x is a data.frame - a table, basically. It's a structure that accommodates multiple vectors/columns of data, which is a little peculiar if you're just reading in a single vector. This has an impact on which functions you can use.
• Some functions, like summary(), naturally accommodate data.frames. If x had multiple fields, summary() would provide the above descriptive stats for each.
• But sd() can only take one vector at a time, which is why I index x for that command (x[ , 1] returns the first column of x). You could use apply(x, MARGIN = 2, FUN = sd) to get the SDs for all columns.

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