03-01-2009
Local max values of a file
I have a data file of two columns (corresponding to the x and y axes of a graph) separated by a comma. I want to find the local maximum values and print them to a file. It has been a while since I've done any scripting and I've forgotten everything. I have a few basic questions.
1.) How do you read a file into a script? I know how to set a variable as a file and to access the file, I just can't recall how to make the file itself a variable to be read into the script.
2.) One a file is set to a specific variable name, how do I access a specific element? (i.e. row and column)
For instance, if I have a file 'data' with composed of the following:
12 23
15 49
19 22
20 12
34 39
45 1
60 56
89 79
I want a to make a file with
15 49
34 39
89 79
but I'm just having trouble remembering how to access the specific elements. i.e. the second column first element.
Any help or direction towards a good resource would be greatly appreciated. Thank you.
-John
Last edited by jemm; 03-01-2009 at 07:30 PM..
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VM(1) mgetty VM(1)
NAME
vm - VoiceModem is the program for handling the voice modem functionality from shell scripts
ACTIONS
beep options [<frequency [<length in 0.001sec>]]>
diagnostics options device name (e.g. ttyS2
dial options phone number
help
play options [<file names]+>
record options file name
shell options [<shell script [shell options]]>
wait options [<time in seconds]>
devicetest
OPTIONS
-c n use compression type n
-d n set i/o device
-t, -m, -i, -e, -s, -H equals to -d <2,3,4,5,6,7>
-l s set device string (e.g. -l ttyS2:ttyC0)
-v verbose output
-w use off / on hook signal from local handset to start and stop recording
-x n set debug level
-L n set maximum recording length in sec
-P print first DTMF tone on stdout and exit
-R read and print DTMF string on stdout and exit
-S s set default shell for shell scripts (e.g. -S /bin/sh)
-T n set silence timeout in 0.1sec
-V n set silence threshold to <n> (0-100%%)
SEE ALSO
vgetty(1)
POD ERRORS
Hey! The above document had some coding errors, which are explained below:
Around line 30:
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