Skip to main content

newcommand in LaTeX

New commands

To add your own commands, use the
\newcommand{name}[num]{definition}
\newcommand{\wbal}{The Wikibook about \LaTeX}
This is ‘‘\wbal'' \ldots{} ‘‘\wbal''
=> This is “The Wikibook about LaTeX” … “The Wikibook about LaTeX”
The next example illustrates how to define a new command that takes one argument. The #1 tag gets replaced by the argument you specify. If you wanted to use more than one argument, use #2 and so on, these arguments are added in an extra set of brackets.

\newcommand{\wbalsup}[1] {This is the Wikibook about LaTeX supported by #1}
\newcommand{\wbalTwo}[2] {This is the Wikibook about LaTeX supported by #1 #2}
% in the document body:
\begin{itemize}
\item \wbalsup{Wikimedia}
\item \wbalsup{lots of users!}
\item \wbalTwo{John}{Doe}
\end{itemize}
  • This is the Wikibook about LaTeX supported by Wikimedia
  • This is the Wikibook about LaTeX supported by lots of users!
  • This is the Wikibook about LaTeX supported by John Doe

But there a lot of caveats :-

  1. LaTeX ignores the blank following a command - So the space has to be specifically inserted with the \space.

    \newcommand{\water}{H$_2$O}
    This would allow one to write, e.g.,



      The formula for water is \water. 
    or


      \water\ is the formula for water.
    Note, in the second case, the trailing \ followed by a blank is required to ensure a blank space after the H2O;

  2.  Math mode doesn't work inside math environment -

    \newcommand{\hypotenuse}{$a^{2}+b^{2}$}
    Note that this will produce the desired formula in text (paragraph) mode because of the $...$ in the definition. In math mode, however, the first $ in the definition will cause LaTeX to leave math mode, causing problems.
    In LaTeX 2.09 a standard trick for getting around this is to put the math-mode expression in an \mbox, viz.,



    \newcommand{\hypotenuse}{\mbox{$a^{2}+b^{2}$}}
    In LaTeX2e the \ensuremath command has been provided to alleviate this problem. The argument of the \ensuremath command is always processed in math mode, regardless of the current mode. Using this mechanism the above could be written as




    \newcommand{\hypotenuse}{\ensuremath{a^{2}+y^{2}}}
     
source : http://en.wikibooks.org/wiki/LaTeX/Customizing_LaTeX

http://www.uz.ac.zw/science/maths/latex/ltx-18.html

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 li…

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
Sweetheart, for me there is none

Taarpore cla…

How to join audio tracks smoothly in Audacity

Audio tracks can be mixed easily in full fledged video editors like kdenlive or Adobe Premiere but for mixing or joining audio they would not provide the amount of control that audio editors like Audacity provide. The example I am going to show today would demonstrate the range of tools in Audacity that allows us to control the waveform and to mold it to our desire.

Today I am going to take a small track like a small 1 min. clip of storm sound and make a long continuous sounding storm audio clip from it.

STEP 1 : Open file
Open the clip in Audacity.

STEP 2 : Removing unwanted audio portion
There is always unwanted sections of the audio that we have to discard. Select the portion of background noise or unwanted audio.


Press DELETE key.

STEP 3 : Duplicating the track
Now we make a copy of the entire waveform and paste it at the end of the track.

Select the SELECT tool (the one which looks like I). Then select the whole waveform and prss Ctrl+c. Now click approximately at the end of the…