Alignment of multi-line equations

[gnubie]

Hi,
I am a physicis student and am using oo math for the first time. I have a had a look on this forum but can't find out how to line up the = on multiline equations

For example, I want to be able to do this:

[gnubie]

Answering my own question, but other people might find this helful

Ive found the best way to do it (after talking to my latex-fanatical friend) is to use matrix, like this:

[richardf]

Your solution woks, my problem with it is that it leaves quite some space between the equal sign and the left and right entries. I have not found any way to set that spacing to less.

I use the following work around with dummy fractions to get the right line spacing:

matrix{alignr color white { 1 over 2} {V_{"E"} " = "} ## alignr color white {1 over 2} " = " ## alignr color white {1 over 2} " = " } matrix {alignl {1 over 2} V_{"CC"} ## alignl {1 over 2} times 7.5 ## alignl 3.75V color white {1 over 2}}

Is there a setting to decrease or increase the spaces between entries in a matrix?

Richard

[waka]

try this:
matrix{V_{"E"} # "=" # {1 over 2} V_{"CC "} ## %% <------------ 4 spaces here after the sub CC
{} # "=" # {1 over 2} times 7.5 ##
{} # "=" # 3.75V } newline

%% now the fractions are aligned
%% or eliminate the second set of hash

matrix{V_{"E"} # "=" ` {1 over 2} V_{"CC"} ##
{} # "=" ` {1 over 2} times 7.5 ##
{} # "=" ` 3.75V } newline

addendum:
""=` can also be used, however, it is moot.

[Asin]

Another way to do it is to use the phantom function which acts like a placeholder for whatever argument it takes. That is, it prints out the same amount of space that it would usually take up, but not actually print out the formula.

(alignl is required otherwise phantom acts strangely on newlines. Alternatively, keep creating brand new Equation objects on each new line and then copy and paste the phantom {V_{"E"}} to avoid using alignl.)

[Gore]

Richard wrote:

[RGB]