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yixinttt

木虫 (正式写手)

[求助] Latex两天都没搞定的公式

大神们,能否帮看看这个公式用Latex插入,搞两天了,还是没搞定。下面是我的代码,但是没对齐。图第一张为要插入的公式,第二张为我插入的,但是没对齐。求大神们指点!

Latex两天都没搞定的公式
公式.jpg


Latex两天都没搞定的公式-1
公式2.jpg

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了解了解
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yixinttt

木虫 (正式写手)

sorry,忘记贴我的代码了!

\begin{equation}
  \left\{
  \begin{aligned}
  \begin{array}{*{5}{c}}
  {P(X_{t+1}=d-1 \mid X_t=d)=
  \begin{cases}
  \frac {2^k-2^d}{2^k-1-t} & ($ 1 $<$ d+1 $ \le$ k $)\\
  0 & ($otherwise$)
  \end{cases}}\\
  {P(X_{t+1}=d \mid X_t=d)=
  \begin{cases}
  \frac {1}{2} \cdot \frac {2^d-1-t}{2^k-1-t} & ($ d $>$ 0, t+1 $\le$ $2^d-1$ $)\\
  0 & ($otherwise$)
  \end{cases}}\\
  P(X_{t+1}=0 \mid X_t=d) = P(X_{t+1} \mid X_t=d)  &{( d   >  0 )} \\
  p(X_{t+1} = 0 \mid X_t=0) = 1
  \end{array}
  \end{aligned}
   \right.
\end{equation}
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2楼2015-06-13 22:31:41
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intoabyss

金虫 (小有名气)

【答案】应助回帖

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yixinttt: 金币+40, 博学EPI+1, ★★★★★最佳答案, 解决了问题! 2015-06-14 09:45:12
试试
\left\{ \begin{align}
  & P({{X}_{t+1}}=d-1\mid {{X}_{t}}=d)=\left\{ \begin{align}
  & \frac{{{2}^{k}}-{{2}^{d}}}{{{2}^{k}}-1-t},(1<d+1\le k), \\
& 0,otherwise; \\
\end{align} \right. \\
& P({{X}_{t+1}}=d\mid {{X}_{t}}=d)=\left\{ \begin{align}
  & \frac{1}{2}\cdot \frac{{{2}^{d}}-1-t}{{{2}^{k}}-1-t},(d>0,t+1\le {{2}^{d}}-1), \\
& 0,otherwise; \\
\end{align} \right. \\
& P({{X}_{t+1}}=0\mid {{X}_{t}}=d)=P({{X}_{t+1}}\mid {{X}_{t}}=d),(d>0); \\
& p({{X}_{t+1}}=0\mid {{X}_{t}}=0)=1 \\
\end{align} \right.
3楼2015-06-13 22:44:43
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yixinttt

木虫 (正式写手)

引用回帖:
3楼: Originally posted by intoabyss at 2015-06-13 22:44:43
试试
\left\{ \begin{align}
  & P({{X}_{t+1}}=d-1\mid {{X}_{t}}=d)=\left\{ \begin{align}
  & \frac{{{2}^{k}}-{{2}^{d}}}{{{2}^{k}}-1-t},(1<d+1\le k), \\
& 0,otherwise; \\
\end{al ...

非常感谢,根据你的代码调整了一下通过了,很标准。谢谢啦
下面是我改后的,其实就把align换成了aligned,之前做到这一步就是把aligned和left位置放反了。

\begin{equation}
\left\{ \begin{aligned}
  & P({{X}_{t+1}}=d-1\mid {{X}_{t}}=d)=\left\{ \begin{aligned}
  & \frac{{{2}^{k}}-{{2}^{d}}}{{{2}^{k}}-1-t},(1<d+1\le k), \\
& 0,otherwise; \\
\end{aligned} \right. \\
& P({{X}_{t+1}}=d\mid {{X}_{t}}=d)=\left\{ \begin{aligned}
  & \frac{1}{2}\cdot \frac{{{2}^{d}}-1-t}{{{2}^{k}}-1-t},(d>0,t+1\le {{2}^{d}}-1), \\
& 0,otherwise; \\
\end{aligned} \right. \\
& P({{X}_{t+1}}=0\mid {{X}_{t}}=d)=P({{X}_{t+1}}\mid {{X}_{t}}=d),(d>0); \\
& p({{X}_{t+1}}=0\mid {{X}_{t}}=0)=1 \\
\end{aligned} \right.
\end{equation}
Latex两天都没搞定的公式-2
公式3.jpg

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4楼2015-06-14 09:42:27
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