cut | 易学教程

bash cut columns to one file and save onto the end of another file

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问题 I would like to cut two columns from one file and stick them on the end of a second file. The two file have the exact same number of lines file1.txt 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 file2.txt a b c d e f g h i j a b c d e f g h i j a b c d e f g h i j a b c d e f g h i j So far I have been using cut -f9-10 file2.txt | paste file1.txt - > file3.txt which outputs exactly what I want 1 2 3 4 5 6 7 8 9 10 i j 1 2 3 4 5 6 7 8 9 10 i j 1 2 3 4 5 6 7 8 9 10 i j However

bash cut columns to one file and save onto the end of another file

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Find cut set in a graph [duplicate]

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问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: Algorithm: for G = (V,E), how to determine if the set of edges(e belong to E) is a valid cut set of a graph A subset S, of edges of a graph G = (V,E), how can one check whether it is a valid cut-set of the graph or not? Note: A cut is a partition of the vertices of a graph into two disjoint subsets. So, cut-set of the cut is the set of edges whose end points are in different subsets of the partition. I am

FFMPEG not “cutting” as expected in Android

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问题 I referred FFMPEG not "cutting" as expected to split video in chunks in below format: 00:00:00 - 00:00:01 00:00:01 - 00:00:02 00:00:02 - 00:00:03 00:00:03 - 00:00:04 00:00:04 - 00:00:05 Here is the command i used: String[] cmd1 = new String []{"-ss", "00:00:00.000", "-i", inputVideoUrl, "-t", "00:00:01.000", "-c:v", "libx264", "-strict", "-2", outputPath}; String[] cmd2 = new String []{"-ss", "00:00:01.000", "-i", inputVideoUrl, "-t", "00:00:02.000", "-c:v", "libx264", "-strict", "-2",

Mutate with different cut points by group

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来源： https://stackoverflow.com/questions/58997131/mutate-with-different-cut-points-by-group

Shell Script to download youtube files from playlist

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来源： https://stackoverflow.com/questions/8921496/shell-script-to-download-youtube-files-from-playlist

cut extracting the minimum and maximum of cut levels as columns in data.frame

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问题 I have a numeric vector that I want to convert to five numeric levels. I can get the five levels using cut dx <- data.frame(x=1:100) dx$cut <- cut(dx$x,5) But I am now having problems extracting the lower and upper boundaries of the levels. So for example (0.901,20.8] would be 0.901 in dx$min and 20.8 in dx$max . I tried: dx$min <- pmin(dx$cut) dx$max <- pmax(dx$cut) dx But this does not work. 回答1: you can try splitting the labels (converted to character beforehand and modified to suppress

Cut Function: Making Irregular cuts in R

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问题 I need to use the cut function to divide into irregular, uneven breaks. I need to cut into ranges such as 1 to 15, 16 to 19, 20 to 45... ect. Though I do not know how to do this or if it is possible. Please help! 回答1: ?cut is a good first step... Here is a sample from which you can build: # create a long vector that you want to cut z <- rnorm(10000) # create a vector with irregular breakpoints breaks <- c( -6, -1, 1, 3, 6 ) # cut the long vector, look at the `table()`d result table( cut( z,

[转帖] Linux下cut命令用法详解

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以下内容欢迎转载，但请保留作者名号及出处，谢谢! 原创：frozen_sucker 链接：http://blog.csdn.net/Frozen_fish/archive/2008/04/08/2260804.aspx 写的挺好的自己之前只是建别人用过现在自己试了下原来很简单. 挺好的. Linux下cut命令用法详解原创：frozen_sucker(冰棍) 有时我们经常会遇到这样一些问题：有一页电话号码薄，上面按顺序规则地写着人名、家庭住址、电话、备注等，此时我们只想取出所有人的名字和其对应的电话号码，你有几种方法可以实现呢？确实这种纵向定位的方式用常规办法难以实现，这时，cut就可以大显身手了。 What’s cut? 子曰：cut命令可以从一个文本文件或者文本流中提取文本列。命令用法： cut -b list [-n] [file ...] cut -c list [file ...] cut -f list [-d delim][-s][file ...] l 上面的-b、-c、-f分别表示字节、字符、字段（即byte、character、field）； l list表示-b、-c、-f操作范围，-n常常表示具体数字； l file表示的自然是要操作的文本文件的名称； l delim（英文全写：delimiter）表示分隔符，默认情况下为TAB； l

echo output not getting assigned to a variable in shell script

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