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Random float numbers in BASH

 
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Old 03-27-2011
Random float numbers in BASH
Hi people Smilie

I'm learning shell scripting using bash and I want to generate 4 floating point number with 5 decimal places and write them to a file and a variable. I've done all this except the $RAMDOM enviroment variable does not generate a float number but a integrer.

I hope you could explain why to lead me to a solution.
Thnak you all in advance.

PS: script so far
Code:
#!/bin/bash

#: Title		: randomFloats
#: Date			: 2011-03-27
#: Author		: pharaoh
#: Version		: 1.0 
#: Discription	        : Generate a 4 float numbers with 5 decimal places and write them to a file and a variable 


listFloats=0.0
for i in $(seq 0 3)
do
    aux=$[($RANDOM % 15000)]
	printf -v aux "%.5f" ${aux}
	
	#In the first iteration it just set the variable, in the others it append
	if [ ${i} -eq 0 ]
	then
		listFloats=${aux}
		printf ${aux} > randomFloats.txt
	else 
		listFloats="${listFloats} ${aux}"
		printf ${aux} >> randomFloats.txt
	fi
done

printf "%s\n" ${listFloats}

 
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rbash

RBASH(1)						      General Commands Manual							  RBASH(1)

NAME

       rbash - restricted bash, see bash(1)

RESTRICTED SHELL

       If  bash  is  started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted.  A restricted shell is
       used to set up an environment more controlled than the standard shell.  It behaves identically to bash with the exception that the  follow-
       ing are disallowed or not performed:

       o      changing directories with cd

       o      setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV

       o      specifying command names containing /

       o      specifying a filename containing a / as an argument to the .  builtin command

       o      specifying a filename containing a slash as an argument to the -p option to the hash builtin command

       o      importing function definitions from the shell environment at startup

       o      parsing the value of SHELLOPTS from the shell environment at startup

       o      redirecting output using the >, >|, <>, >&, &>, and >> redirection operators

       o      using the exec builtin command to replace the shell with another command

       o      adding or deleting builtin commands with the -f and -d options to the enable builtin command

       o      using the enable builtin command to enable disabled shell builtins

       o      specifying the -p option to the command builtin command

       o      turning off restricted mode with set +r or set +o restricted.

       These restrictions are enforced after any startup files are read.

       When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.

SEE ALSO

       bash(1)

GNU Bash-4.0							    2004 Apr 20 							  RBASH(1)