There’s one part of the book that seemed a little out of place: Chapter 8, an introduction to the command line. I’d feel good about giving a copy of this book to someone who hasn’t used Linux. By that I mean it has the level of polish and detail that I’ve more often seen in books written for those operating systems than in books written for Linux. The book reads like the best books on how to use Windows or Mac, only for Ubuntu. In particular, it focuses on the current version, version 12.04, and its Unity user interface. It is primarily about Ubuntu specifically rather than Linux in general. rather than writing code and would find the book handy. It’s primarily aimed at non-technical users, but programmers are often in the same boat as everyone else when they’re managing photos etc. Ubuntu Made Easy is all about doing common tasks with Ubuntu. It’s sort of a GUI counterpart to The Linux Command Line from the same publisher. The latest book from No Starch is Ubuntu Made Easy: A Project-Based Introduction to Linux and it lives up to the expectations I have of No Starch books. They give me books to review, but that’s kinda necessary if I’m going to review them.) Their books are fairly dense with technical content, but they also have a casual style and a sense of humor that makes them easier to read. (This isn’t some sort of paid endorsement I don’t make any money from them. Volatility in adaptive randomization clinical trials.Randomization that will stand up in court.But if you run it twice you will get different results. I don’t know how shuf seeds its random generator. For example, when I ran the command above on a file containing alpha To select 10 lines drawn with replacement from foo.txt, regardless of how many lines foo.txt has. For example, you could run shuf -r -n 10 foo.txt In that case you can select more lines than are in the file since lines may be reused. You can also sample with replacement using the -r option. If you ask for an impossible number of lines, the -n option is ignored. You can’t select 10 lines without replacement from a file with less than 10 lines. For example, shuf -n 10 foo.txtĪctually, it would select at most 10 lines. So it’s doing sampling without replacement. With the option -n you can specify how many lines to return. Given just a file name, shuf randomly permutes the lines of the file. This could be useful for random sampling. I recently learned about the Linux command line utility shuf from browsing The Art of Command Line.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |