Programming :: MATLAB - Any Valid Free Alternatives?
Mar 2, 2010
I need MatLab for a course at the university, but it's not an open source software as all of you know, so I wanted to know if there are valid freeware alternatives. I was told to use Octave or Scilab if I didn't want to buy the license and so I would like to know what's better in terms of MatLab compatibility and ease of use, if there are any other (and maybe better) alternatives and also if there are free Simulink-like programs.
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Dec 31, 2009
I keep getting the following error when trying to install anything:
Could not retrieve mirrorlist http://mirrors.rpmfusion.org/mirrorl...d-11&arch=i386 error was
[Errno 14] HTTP Error 404: Not Found
Error: Cannot find a valid baseurl for repo: rpmfusion-free-updates
So this tells me the servers are down however if i put the link in FF I don't get 404.I am installing on a new box and I can't get the stuff I need.
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Nov 25, 2010
I am working on scraping a sit e but during the authentication process (a form and user/password then submit) a javascript pop-up window comes up that needs to be pressed.I was planning on using www:mechanize but found out it doesnt do javascript.
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Apr 28, 2011
I am writing some code in matlab and I would like to do some reading of how to write cleaner code and how to name variables and write comments. One more questions. Let's say that I find for example a file that has really nice structured comments. For example specific format commenting function inputs, outputs author code. Can afterwards copy and paste and use someone's comments format or this is might some copyright problem?
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Jan 29, 2010
Here is the code, which just creates a dynamic array? fills it? and prints.
At the end-point? when doing 'free(digits);' I get a debug messge. But the programm continues to work, or it crashes only on free?
How do I need to change the source-code, not to recieve a message from debugger?
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Mar 2, 2010
I saw a wierd code in perl code recently it went kind of like this: die 'error' if (xxx); Now is that valid perl?
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Jun 14, 2010
I have confusion regarding pthreads return value. All in short, is the is a valid return value ?
[source]
void * myThrRoutine(void *arg)
{
struct myStruct **myst = (struct myStruct**) arg;
cout<<"In thread "<<(*myst)->var<<(*myst)->msg<<endl;
int x = 20;
pthread_exit((void*)x);
}
[/source]
This seems to work fine on pthread_join , but I want to ensure it is not by chance.
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Apr 16, 2010
I have been working on this way too long now...this *should* be simple. I must be missing something simple at this point.
Code:
function f_is_ip()
{
if [ "`echo "$1" | /bin/egrep "[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}"`" != "" ] ## Error on this line
[Code]....
When I echo $1 ## prints 192.168.1.22
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Dec 30, 2010
under windows, when i call free() on a non-pre-allocated char pointer nothing happens, but when i do the same call under linux the whole application crashes :/
is there anyway to avoid crashing? safe free() call that does nothing when fail?
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Dec 28, 2010
I learned Java(SE,EE) few years ago and didn't use it because we are using PHP and ASP.NET at work.However, I would like to ask a question: Is Java (SE,EE) free for use for business purpose?I mean,if I start up a company and use tomcat with java, do I have to pay for the license to use Java?I don't know much about java license until I learned that ASF(Apache Software Foundation) quited from the Java Community recently.As a result,they recalled my attention regarding the legitimacy of using java in business purpose for free.
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Jan 11, 2010
Is there a way to hook calls to new/malloc, delete/free in C++? I tried the following methods: LD_PRELOAD -> fails for malloc, because dlsym seems to depend on malloc -Wl,--wrap,malloc -> doesn't work for 'new' gcc hooks -> doesn't work always, e.g. for uclibc there are no hooks Are there any other methods I could try?
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Jun 9, 2010
I would like to have on a website a notepad ONLINE, so that my friend and me can work on a document TXT together or well we can refresh it every 5min...
well such online notepad is not free... anyone has an idea where it is possible to find the code for this. I am not good in PHP, and not informatician.
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Feb 18, 2011
We have a program that catalogs to 40 different mount points. The program is fine as long as thier is free space on at least one of the 40 mount points. My boss wants me to come up with a script that will email us daily to know how much overall free space is left. I know I can do a df but I don't know how to combine the 40 mount points into a single disk used/disk free report.
The 40 mount points are /dev/mapper/areaxx, xx being 01 to 40.
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Jun 1, 2011
Google directed me to the ones written in .Net/C# etc. Any ideas on the ones written in C/C++?
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Jan 15, 2010
I was wondering what would be a good, no-cost way to distribute software that I wrote? And what would be a good way to make it free/open source?
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Jul 21, 2010
I need to monitor the amount of free physical memory on Linux from within a large C program. The sampling will occur very frequently, so the measurement cannot be performance intensive. The fact that Linux uses much of the theoretically free memory for cache and buffers means that just measuring the free pages is not sufficient. Using free + cache + buffers gives an overestimate as not all cache/buffers can be freed, but I could get a rough idea of how much generally can't and subtract that from the answer.
Possible options that I've come across so far are: Parsing /proc/meminfo - but that involves reading from file which is slow. Extracting the free, cache and buffers values from the output of the Free command - but is there a quick way to do this? Parsing the /proc/freemem file produced by the API here - but this is again reading from file. Is there a way to get that output directly? Speed is an extremely high priority, and the answer it must accurately represent the amount of memory that my program could expand into (to within a few Mb).
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Feb 24, 2011
I'm creating a bash script to check how much free space is left in /var directory then, if it hits a certain threshold, delete certain files with numbers for extensions (e.g. fileA.1, fileA.2 fileA.3, and fileA.4, fileB.1, fileB.2 fileB.3, and fileB.4 ). Here's a snippet from my script:
[Code]...
If I use a * as a wildcard for the number extension, the script fails. Maybe regex would work here, but I'm not particularly accomplished at it. Or some other construct.
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Mar 27, 2010
Was wondering if anyone can explain briefly the relationship of "cache" and free memory in the "free" memory command.
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Jun 16, 2010
During playing around sources, synaptic playing I messed up the default list. I know I should have been more careful. Anyways could someone tell me what the default the default sources.list that has free and non free etc for squueze please? I have been trying to get the default list but I cannot find it anywhere. There are alot of lists out there but nothing tagged like the "default" list.
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May 18, 2011
I've got a question on free disk space. I'm currently running CentOS 5.5 on in Xenserver virtual environment. We've had an issue with disk space. My question is as follows: - from a ssh connection i run df -h this gives the value of 90% used leaving me with 9GB. If I use system monitor via a VNC connection the free disk space value is 20GB free on the same volume. Which one is correct? I do use SNMP to monitor the same volume and should alert me when < 10% is free I know this works as I set the alert threshold to < 90% I get an alert.
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Jan 28, 2011
I've just installed Fedora 14 64bit and would like to add new repositories. I read here to do the following command (which as you can see doesn't works) :
Code:
$ su -c 'yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm'
[code]....
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Jan 28, 2011
I have installed F14 yesterday but i can not install rpmfusion repository, the problem is that i can not access the url [URL] so i cant download the files:
rpmfusion-free-release-stable.noarch.rpm
rpmfusion-nonfree-release-stable.noarch.rpm
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Jun 10, 2010
Am I asking too much for a FREE OS? Everybody spend their precious time to help others, that's very helpful.But it seems like there is no support from UBUNTU team,how could we even get through the barrier of not using Microsoft's OSes? No free lunch of course, but it seems to me some issues have never really been solved.I read lot's of people have problem with their WIFI, not just for my OLD USB wifi adapter. I don't have problem with WIFI in XP/Server.
I posted here and there, and seems like no answer, and I do not get any reply from UBUNTU support team,forgive me if I run out of google's keywords.I just need a simple answer, is my WIFI going to work in UBUNTU with a layman effort? I like linux and UBUNTU had put great effort in providing me such a great OS, but if a basic internet connection will need to spent sooo much time to setup, and it still doesn't work. IS IT WORTH to switch to UBUNTU at all
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Jul 25, 2010
I have 160gb laptop. i installed vista in c primary partition which is 25gb and installed ubuntu in d primary partition which is 20gb. A remainig for my data. Now i tried to install CENT OS by formatting ubuntu. I inserted CENT OS DVD and restarted and i selected to delete my /dev/sda2 which is showing 20480mb and it shown me free space. but i tried to add partion /boot of 100mb it got added. but, when i am trying to add / of 3000mb in the remaining 20380mb free space it showing an error message that no free space is available.
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Nov 14, 2010
I am having with Pan and can't seem to get any love. I'm ready to just scrap Pan but I can't find an alternative.Does anyone know of anything similar that, you know, actually works?
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Sep 8, 2010
Oracle has left a bad taste in my mouth as of late, and I'm looking to remove any software affiliated with them from my machine. I haven't had any problems in terms of finding replacements until I came to OpenOffice, of which I have been a user for years.
I am aware of the existence of Gnome Office and KOffice and have been tinkering with both, but I am curious as to whether or not anyone here on LQ has found a more suitable replacement.Here's hoping someone forks OO.o before Oracle pulls another stunt.
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Jan 8, 2010
I am trying to test a Gigabit Ethernet Tattile line scan camera. I installed the driver properly set the ip of device using utility given in the driver. when i am trying to open the live view of camera using a utility given (tag_show) it gives me error in /var/log/messages TBP ERROR: No buffers available in free buffers list When i looked into the code of utility it is doing ioctl call where it is failing with errno=12.
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Jun 24, 2011
F15 running on my Dell Latitude 505 laptop. During installation (last week) I got "Gnome3 not fully supported - using fallback mode". I found out later that my Intel 855 video doesn't support 3D, which Gnome3 requires.
System seems to run fine and boots into fallback video. But I'd sure like to have access to my "desktop" so I can drag and drop folders, etc. there. Currently I now have to open the Desktop folder, and then drag and drop, etc. And without an "active" desktop screen, added devices (external drives, cameras, etc.) don't show up unless I open the Desktop folder. Is there an alternative to Gnome3 I can install? I assume without the need for 3D which my Intel video 855 doesn't support.
If there's an alternative or two, could someone point me to exactly how to install them? If there's a more appropriate forum here for this request,
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Aug 23, 2010
I have heard that SSH was originally for BSD. Is this correct? And what alternatives to SSH do GNU users use? Or do people just not use GNU for SSH or an SSH type application?
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Aug 31, 2010
So, are there any alternatives to X for Linux? I often hear about other DEs that run on X11 or X, but I have read here and there that there are some alternatives that have picked up a little steam lately, but I know absolutely nothing about them.
What are these alternatives and how would you go about trying them? Are there any live distros that use anything but X?
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