Skip to main content

Mathematica problem in Linux (Hardy)

1. Backspace or delete working until i turn numlock off.

This is an old mathematica bug fised in recent versions. The Mod2 key is probably mapped to your Num Lock key. If the Mod2 keysym is mapped to Num Lock, hit the Num Lock key to turn it off.

Depressing Mod2 turns on an undocumented feature of the X front end - global selection. When global selection is activated, the mouse pointer will change from an I-beam to a hand. You cannot place a text edit cursor within a cell in this mode, but if you select a cell of a given style, then all cells of that style will be selected.

To avoid this situation in the future, simply remap Mod2 to another key using xmodmap or some other keyboard configuration utility.
Notes

It appears that by default Mandrake Linux 8 sets the Num Lock key on and maps it to Mod2. Therefore, it is suggested that you remap Mod2 to another key as described above.

source : http://support.wolfram.com/mathematica/systems/linux/general/configurenumlock.html

If you want to configure your linux machine so that Mathematica can use the NumLock key.(http://support.wolfram.com/mathematica/systems/linux/general/configurenumlock.html)

I add the relevant excerpt for convenience -

If you would prefer to use the number lock key with Mathematica, you can either use xmodmap to remap the mod_2 key to something other than number lock, or you can add the following to your ~/.Xresources file:

*secondaryModifierMask: Mod3Mask

Then reload your Xresources with

$ xrdb -load ~/.Xresources

Now when you start Mathematica, the number lock key should not effect cell evaluation. You can also do this at the system-wide level by editing the following file as root:

$TopDirectory/SystemFiles/FrontEnd/SystemResources/X/XMathematica

where $TopDirectory is where you have installed Mathematica, usually something like /usr/local/Wolfram/Mathematica/5.0 or /usr/local/Wolfram/Mathematica/5.1.

In it find the following lines:

! Set these if you need to change what the FE uses for Primary (Command)
! and Secondary (Option) modifier keys.
!*primaryModifierMask: Mod2Mask
!*secondaryModifierMask: Mod3Mask

and uncomment (delete the ! mark) within the line containing secondaryModifierMask. This will cause the modifier key to be mapped to Mod3 instead of Mod2 (which is usually number lock).


2. I type but numbers and texts don't appear. Only the symbols appear.

This is because of using compiz. The text foreground color is white. Do this,

$ export XLIB_SKIP_ARGB_VISUALS=1

before start mathematica (or add it to ~/.bashrc or mathematica start script) solve the problem.
http://ubuntuforums.org/archive/index.php/t-89899.html

If still not working use bruteforce. Start mathematica with

$ mathematica -defaultvisual &
(https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/197163)

3. Xtra windows appear with mathematica

Regarding compiz and extra kernel windows, if you open Format, Option Inspector. Now select "Global preferences" in "Show option values". Then goto Notebook options, Window Properties, Window Frame and change it from "Normal" to "Generic", the extra windows will not appear when using compiz anymore.

(Note that the above commands work in all shells except the export commands. For that go into bash shell by typing bash at the command prompt.)

Comments

Popular posts from this blog

Fastest way to send multiple drafts from gmail

People claim that the fastest way to send multiple email drafts is to use Gmail IMAP with email client like Outlook or Evolution or Thunderbird. But I have found this is not true. Because Thunderbird and Evolution etc. email clients treats the drafts as emails still to be edited. So it is not just simple select all and hit send. Each email draft has to be opened and sent separately. That is a lot of clicks and mouse movements, wasting precious time and energy. I have a better solution which involves minimum keystrokes and mouse usage. Efficiency booster technique for sending emails. If someone is feeling adventurous and want to try it from the Gmail interface itself, here's how to do it in the fastest possible manner. It involves using the mouse once. Select the first draft. Gmail would open a new email box and put the cursor inside the box to write. Press TAB once to go the Send button. Press ENTER to send. Now Gmail sends it and the box is gone but the highlight goes to the last

LYRICS OF CHANDRABINDOO

___________________________________________________________________ SWEET HEART FROM AAR JAANI NAA(T-SERIES) -- SWEETHEART -- Pratham college-er din ta Aajo thik e mone poRey scene ta Dada didi haath dhorey siNRi tei bose poRey Aamar chokh ta ghorey bon bon bon bon Sweetheart, I am seating alone Sweetheart, for me there is none DhoNk gile chole gelo pratham maas Meye dekhlei feli deergho-shwash DhoNk gile chole gelo pratham maas Meye dekhlei othe nabhishwash Meyera bheeshan smart poRey chhoto mini-skirt Aamar e je sheet korey kon kon kon kon Sweetheart, I am seating alone Sweetheart, for me there is none Taarporey kete gelo maas chaar Fuse holo je kato future Bandhura purse khule eke oke taake tole Aamar pran ta korey chon mon chon mon Sweetheart, I am seating alone Sweetheart, for me there is none Ekdin lawn theke beriye Ek tanayaar dike taakiye Hawt korey ki je holo magaj ta ghurey gelo Taar kaaner saamne kori ghyan ghyan ghyan ghyan Sweetheart, I am seating alone Sweethea

Changing the font size of section headings in LaTex

You have several ways to do so: 1.- A direct redefinition of \section: \makeatletter \renewcommand\section{\@startsection{section}{1}{\z@}%                                   {-3.5ex \@plus -1ex \@minus -.2ex}%                                   {2.3ex \@plus.2ex}%                                   {\normalfont\large\bfseries}} \makeatother 2.- By means of the titlesec package: \usepackage{titlesec} \titleformat{\section}{\large\bfseries}{\thesection}{1em}{} 3.- By means of the sectsty package: \usepackage{sectsty} \sectionfont{\large} source : http://www.latex-community.org/forum/viewtopic.php?f=4&t=3245   Now, I would explain the titlesec package a bit more (because it seems easier to me and with more options) : To change the section fonts with this package put the following lines in the preamble - \usepackage{titlesec} \titleformat{\ section }{\ large \ bfseries }{\thesection}{1em}{} Options available are- a> Font size - \normals