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Works great in ubuntu linux with bash 5.0.3(1)-release. Thanks both!

I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned...

Sorry - one other question. Although I can send the codes to port, it is very slow. I'm not sure why. I tried changing the baud rate but that didn't make any difference.

Not sure if this is...

Perfect - thanks!

I have some matlab code that sends the serial port elements of an array using matlab's fwrite function, e.g.:
fwrite(s, [170 01 06 06 85], 'uchar');

What would be a unix shell equivalent? E.g.,...

The (longer) script that I am working on does something like this:
#!/bin/bash

while true
do
clear
sleep 1
shuf -i1-2 -n1
sleep .1
clear
echo "Press 1 if you saw a 1....

Thanks a lot!

I have a file with a single column of numbers. Starting from the 11th line, I'd like to find the line(s) on which the number meets two criteria: 1) it is less than the 10 numbers that precede it, 2)...

I am running a psychology experiment with a UNIX shell script as a front end. This precedes each trial:

echo -e "\n\n\n ***Ready***"
sleep 1
clear

Is there a way to get rid of the flashing...

Thanks.

Maybe my redirect syntax is wrong? I get no output for

command &> /dev/null | grep foo

I know my grep command is ok - I checked by redirecting to file instead and grepping the file after...

How can I redirect all stdout and stderr messages from a command to /dev/null (or to a file if need be) except messages that start with the word 'foo'? Messages that start with 'foo' need to be...

Awesome - thank you both very much.

How can I sort lines in a file in a consistent, user-defined way that is not alphabetical, numeric, or patterned in any other way (e.g., sort a bunch of 5 line files to always print lines 2,5,3,4,1)?...