排版LaTeX中

Question

大矩陣我有一個3x12矩陣我想投入我的乳膠（與amsmath）文檔，但乳膠似乎當矩陣變得大於3×嗆：

\begin{equation} 
\textbf{e} = 
\begin{bmatrix} 
1&1&1&1&0&0&0&0&-1&-1&-1&-1\\ 
1&-1&0&0&1&1&-1&-1&0&0&1&-1\\ 
0&0&1&-1&1&-1&1&-1&1&-1&0&0 
\end{bmatrix} 
\end{equation} 

錯誤：額外對齊選項卡已更改爲\ cr。告訴我，我有比bmatrix環境可以處理更多的&。有沒有適當的方法來處理這個問題？這似乎也爲1和-1的不同，走線也預計bmatrix的？

Answer 1

從amsmath文檔（texdoc amsmath）：

The amsmath package provides some environments for matrices beyond the basic array environment of LATEX. The pmatrix, bmatrix, Bmatrix, vmatrix and Vmatrix have (respectively) (), [ ], { }, | |, and ∥ ∥ delimiters built in. For naming consistency there is a matrix environment sans delimiters. This is not entirely redundant with the array environment; the matrix environments all use more economical horizontal spacing than the rather prodigal spacing of the array environment. Also, unlike the array environment, you don’t have to give column specifications for any of the matrix environments; by default you can have up to 10 centered columns. (If you need left or right alignment in a column or other special formats you must resort to array.)

即bmatrix默認爲10列最大。

腳註增加

More precisely: The maximum number of columns in a matrix is determined by the counter MaxMatrixCols (normal value = 10), which you can change if necessary using LATEX’s \setcounter or \addtocounter commands.

Answer 2

斯科特的答案是正確的，但我已經學會了，因爲你可以覆蓋對齊。從http://texblog.net/latex-archive/maths/matrix-align-left-right/

\makeatletter 
\renewcommand*\env@matrix[1][c]{\hskip -\arraycolsep 
    \let\@ifnextchar\new@ifnextchar 
    \array{*\c@MaxMatrixCols #1}} 
\makeatother 

採取現在允許命令：

\begin{bmatrix}[r] .... 

有右對齊！