From b8915d0d5788dbb14e6a7ea3cef933ff6e5ffe4c Mon Sep 17 00:00:00 2001 From: Milad Fatenejad Date: Sat, 31 Mar 2012 21:46:01 -0500 Subject: [PATCH] More updates to the shell section --- 1-Shell/Readme.md | 52 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 51 insertions(+), 1 deletion(-) diff --git a/1-Shell/Readme.md b/1-Shell/Readme.md index 3141a52..ff25032 100644 --- a/1-Shell/Readme.md +++ b/1-Shell/Readme.md @@ -7,7 +7,7 @@ **Presented By : Milad Fatenejad** -**Based on a presentation By: ??????** +**Most of this material came from a presentation by: ??????** # What is the shell how do I access the shell? @@ -34,3 +34,53 @@ most important reasons are that: your computer. You will also be able to perform many tasks more efficiently. +The shell is just a program and there are many different shell +programs that have been developed. The most common shell (and the one +we will use) is called the Bourne-Again SHell (bash). Even if bash is +not the default shell, it usually installed on most systems and can be +started by typing "bash" in the terminal. Many commands, especially a +lot of the basic ones, work across the various shells but many things +are different. I recommend sticking with bash and learning it well. + +# The Example: Manipulating Experimental Data Files + +We will spend most of our time learning about the basics of the shell +by manipulating some experimental data from a hearing tests. + +**Cochlear Implants** + +A cochlear implant is a small electronic device that is surgically +implanted in the inner ear to give deaf people a sense of +hearing. More than a quarter of a million people have them, but there +is still no widely-accepted benchmark to measure their effectiveness. +In order to establish a baseline for such a benchmark, our supervisor +got teenagers with CIs to listen to audio files on their computer and +report: + +1. the quietest sound they could hear +2. the lowest and highest tones they could hear +3. the narrowest range of frequencies they could discriminate + +To participate, subjects attended our laboratory and one of our lab +techs played an audio sample, and recorded their data - when they +first heard the sound, or first heard a difference in the sound. Each +set of test results were written out to a text file, one set per file. +Each participant has a unique subject ID, and a made-up subject name. +Each experiment has a unique experiment ID. The experiment has +collected 351 files so far. + +The data is a bit of a mess! There are inconsistent file names, there +are extraneous "NOTES" files that we'd like to get rid of, and the +data is spread across many directories. We are going to use shell +commands to get this data into shape. By the end we would like to: + +1. Put all of the data into one directory called "alldata" + +2. Have all of the data files in there, and ensure that every file + has a ".txt" extension + +3. Get rid of the extraneous "NOTES" files + +If we can get through this example in the available time, we will move +onto more advanced shell topics... + -- 2.26.2