Hi I want to genrate 10 random 32 bit binary numbers with hamming distance 4 and 8.
11010110010101010101010101010101
11010110010101010100010101010010
if we look carefully at these two binary numbers they differ at 4 places hence hamming distance 4. Now I want to genrate these numbers... (2 Replies)
Im new to C, and Im having a hard time getting a random number.
In bash, I would do something similar to the following to get a random number;
#!/bin/bash
seed1=$RANDOM
seed2=$RANDOM
seed3=$RANDOM
SEED=`expr $seed1 * $seed2 / $seed3`
echo ${SEED%.*}
Now, in online examples... (4 Replies)
I want to generate an awk function that generated a Gaussian distributed set of random numbers. I need to implement the thing below in awk. Rnd is just a uniform random number between 0 and 1
function rgaussian(r1, r2) {
Do
v1 = 2 * Rnd - 1
v2 = 2 * Rnd - 1
... (0 Replies)
Hello.
Could anyone help me with my little annoying problem?
I have to generate a 512 MB file made up with random data using DD. After some internet digging I found out that the command is:
dd if=/dev/urandom of=/exemple/file bs=512MB
After running this command the... (2 Replies)
Hi there I am trying to generate a random number between 40 and 70 using the shell here is my code so far and it keeps going above 70. all help much appreciated!
comp=$(( RANDOM%70+40 ))
echo $comp (4 Replies)
Having a hard time with this. Very new to scripting and linux. Spent all sunday trying to do this. Appreciate some help and maybe help breaking down what the syntax does.
Create a Bash program. It should have the following properties
• Creates a secret number between 1 and 100
i. The... (3 Replies)
Hi,
How can I generate a string of random characters (alpha+numeric) of a particular length ?
For e.g. for
n=5, output = 'kasjf'
n=10, output = 'hedbcd902k'
Also, please let me know if random (valid) dates could also be generated.
Thanks (7 Replies)
Hi Guys and gals...
As you know I am getting to grips with POSIX and hit this stumbling block.
Generating two random numbers 0 to 255 POSIXly. Speed in not important hence the 'sleep 1' command.
I have done a demo that works, but it sure is ugly! Is there a better way?
#!/bin/sh
# Random... (12 Replies)
Discussion started by: wisecracker
12 Replies
LEARN ABOUT DEBIAN
memshuffle
MEMSHUFFLE(3pub) C Programmer's Manual MEMSHUFFLE(3pub)NAME
memshuffle - make an array be in random order
SYNOPSIS
#include <publib.h>
void *memshuffle(void *block, size_t elsize, size_t elnum);
DESCRIPTION
memshuffle will move around the elements of an array in a random fashion. It uses the standard library function rand(3) to get the pseudo-
random numbers it needs. The caller must set a suitable seed with srand(3).
RETURN VALUE
memshuffle returns its first argument.
EXAMPLE
To shuffle an integer array one might do the following.
int array[4] = { 1, 2, 3, 4 };
memshuffle(array, sizeof(array[0]), 4);
BUGS
On many systems rand(3) is not of very good quality. However, it is the only random number generator that can be assumed to exist. Making
it possible for the caller to provide an alternate source of random numbers (e.g., via a function pointer) is perhaps too more trouble than
its worth. A better way would be for everyone to fix their rand's.
SEE ALSO publib(3), memrev(3), rand(3), srand(3)AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual MEMSHUFFLE(3pub)