I was wondering if anyone has used VMWare Workstation? I wanted to practice and learn Unix in a networking environment and have my own home lab. However room and money prevent me from buying several computers to do so. Any input would help thank you. (0 Replies)
In the following Shell Script can anyone help me?
What are the total scripts?
What are the total binaries?
What are the total files?
#!/bin/sh
GREP="/bin/grep -q"
if ; then
if ; then
for | in ${I}/* ;do
file ${I} | ${GREP} "executable" && echo "${I} is a binary"
file ${I} |... (1 Reply)
heres the lab i did everything but when i issue the automated lab check.
but it gives me this everytime
''you are missing the /home/smichaels/Labs/lab2b/group file, please create it as per step 12 of the lab.
once you have corrected this problem, re-run the uli101.023 program''
im... (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
''you are missing the /home/smichaels/Labs/lab2b/group file, please create it as per step 12 of the lab.
once... (4 Replies)
hi.. this is shell scripting lab15.sh
i dont understand this lab i am at the screen shot part. i was wondering if someone can take a quick look at this lab i have linked the doc below. i dont know where to start
i have did the
Required Errorlevels
Errorlevel # but dont... (1 Reply)
Write a script that copies the file tree (including subdirectories) in your home directory. As the initial directory to take the directory / usr / share / doc, as the destination directory using the directory $ {HOME} / doc.
Write a script corresponding to paragraph 1. Additional conditions: a)... (1 Reply)
So, I have a kindof off the wall question. I've got 10 computers which I inherited from a charter school that closed that I did their admin work for. They're not servers, just workstations with ubuntu server running on them. I had them all up and running at one point... but crimineys the load on my... (8 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Here are my directions. I am pretty sure I am doing this right, but I just want someone more experienced to look... (4 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Create a group id with your last name. Create 2 user IDs using your last name and the numbers 1 and 2. For each... (3 Replies)
Hello,
Do you have any suggestion of any tool (web based preferably) about how to organize a lab environment?
Now i save some info in excel sheet (one rack per column) , but i was thinking if any software exists.
Thanks in advance! (2 Replies)
Discussion started by: @dagio
2 Replies
LEARN ABOUT REDHAT
pdl::opt::simplex
Simplex(3) User Contributed Perl Documentation Simplex(3)NAME
PDL::Opt::Simplex -- Simplex optimization routines
SYNOPSIS
use PDL::Opt::Simplex;
($optimum,$ssize) = simplex($init,$initsize,$minsize,
$maxiter,
sub {evaluate_func_at($_[0])},
sub {display_simplex($_[0])}
);
DESCRIPTION
This package implements the commonly used simplex optimization algorithm. The basic idea of the algorithm is to move a "simplex" of N+1
points in the N-dimensional search space according to certain rules. The main benefit of the algorithm is that you do not need to calculate
the derivatives of your function.
$init is a 1D vector holding the initial values of the N fitted parameters, $optimum is a vector holding the final solution.
$initsize is the size of $init (more...)
$minsize is some sort of convergence criterion (more...) - e.g. $minsize = 1e-6
The sub is assumed to understand more than 1 dimensions and threading. Its signature is 'inp(nparams); [ret]out()'. An example would be
sub evaluate_func_at {
my($xv) = @_;
my $x1 = $xv->slice("(0)");
my $x2 = $xv->slice("(1)");
return $x1**4 + ($x2-5)**4 + $x1*$x2;
}
Here $xv is a vector holding the current values of the parameters being fitted which are then sliced out explicitly as $x1 and $x2.
$ssize gives a very very approximate estimate of how close we might be - it might be miles wrong. It is the euclidean distance between the
best and the worst vertices. If it is not very small, the algorithm has not converged.
FUNCTIONS
simplex
Simplex optimization routine
($optimum,$ssize) = simplex($init,$initsize,$minsize,
$maxiter,
sub {evaluate_func_at($_[0])},
sub {display_simplex($_[0])}
);
See module "PDL::Opt::Simplex" for more information.
CAVEATS
Do not use the simplex method if your function has local minima. It will not work. Use genetic algorithms or simulated annealing or conju-
gate gradient or momentum gradient descent.
They will not really work either but they are not guaranteed not to work ;) (if you have infinite time, simulated annealing is guaranteed
to work but only after it has visited every point in your space).
SEE ALSO
Ron Shaffer's chemometrics web page and references therein: "http://chem1.nrl.navy.mil/~shaffer/chemoweb.html".
Numerical Recipes (bla bla bla XXX ref).
The demonstration (Examples/Simplex/tsimp.pl and tsimp2.pl).
AUTHOR
Copyright(C) 1997 Tuomas J. Lukka. All rights reserved. There is no warranty. You are allowed to redistribute this software / documenta-
tion under certain conditions. For details, see the file COPYING in the PDL distribution. If this file is separated from the PDL distribu-
tion, the copyright notice should be included in the file.
perl v5.8.0 2000-05-30 Simplex(3)