General ⇒ How to write this formula

[gcheer3]

I want to show the formula as in the pic.
I dont know how to change the line:
I tried this, but this formula is too long to fit the pape:
Thank you for your help

Code: Select all

     \alpha_{act}^{recalc}=\sum_{x_{11}=0}^{n_{11}}\sum_{x_{12}=0}^{n_{12}}\sum_{x_{21}=0}^{n_{21}}\sum_{x_{22}=0}^{n_{22}}\binom{n_{11}}{x_{11}}\binom{n_{12}}{x_{12}}\binom{n_{21}}{x_{21}}\binom{n_{22}}{x_{22}}\times\pi^{x} \, (1-\pi)^{n-x}\centerdot 1_{\left\{\chi^{2}\geq\chi^{2}_{1,1-\alpha}\right\}}

Then I tried this, still doesnt work

Code: Select all

   \[
   \begin{align}
     \alpha_{act}^{recalc} &=\sum_{x_{11}=0}^{n_{11}}\sum_{x_{12}=0}^{n_{12}}\sum_{x_{21}=0}^{n_{21}}\sum_{x_{22}=0}^{n_{22}}\binom{n_{11}}{x_{11}}\binom{n_{12}}{x_{12}}\binom{n_{21}}{x_{21}}\binom{n_{22}}{x_{22}}&\times\pi^{x} \, (1-\pi)^{n-x}\centerdot 1_{\left\{\chi^{2}\geq\chi^{2}_{1,1-\alpha}\right\}}
   \end{align}
   \]

[gmedina]

Try something like

Code: Select all

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{align}
  \begin{split}
  \alpha_{\text{act}}^{\text{recalc}}=
  &\sum_{x_{11}=0}^{n_{11}}\sum_{x_{12}=0}^{n_{12}}\sum_{x_{21}=0}^{n_{21}}\sum_{x_{22}=0}^{n_{22}}
  \binom{n_{11}}{x_{11}}\binom{n_{12}}{x_{12}}\binom{n_{21}}{x_{21}}\binom{n_{22}}{x_{22}}\\
  &\times\pi^{x} \, (1-\pi)^{n-x}\cdot 1_{\left\{\chi^{2}\geq\chi^{2}_{1,1-\alpha}\right\}}
  \end{split}
\end{align}

\end{document}

Basic documentation: amsmath documentation, mathmode.

[gcheer3]

Also, how can I make an extra spacing between two rows ( not necessary for math, also for text)? I tried \par \par, but that didnt help. It cannot make double spacing between two lines.

[localghost]

You can tune the solution of gmedina a little bit by inserting a \quad right before the \times command at the beginning of the second line of the equation. So this line is indented as seen on the picture.

Also, how can I make an extra spacing between two rows ( not necessary for math, also for text)? I tried \par \par, but that didnt help. It cannot make double spacing between two lines.

Insert a vertical space after the line break.

Code: Select all

\begin{align}
  \alpha_\text{act}^\text{recalc}
  \begin{split}
    &=\sum_{x_{11}=0}^{n_{11}}\sum_{x_{12}=0}^{n_{12}}\sum_{x_{21}=0}^{n_{21}}\sum_{x_{22}=0}^{n_{22}}\binom{n_{11}}{x_{11}}\binom{n_{12}}{x_{12}}\binom{n_{21}}{x_{21}}\binom{n_{22}}{x_{22}} \\[2\baselineskip]
    &\quad\times\pi^{x} \, (1-\pi)^{n-x}\cdot 1_{\left\{\chi^{2}\geq\chi^{2}_{1,1-\alpha}\right\}}
  \end{split}
\end{align}

Best regards
Thorsten¹

[Stefan Kottwitz]

Hi,

just a short remark: align is not necessary in the given solution, a simple equation environment with the split environment inside is enough. Notice that Thorsten set the & separation symbol before the = relation symbol, gmedina set it before \sum, I prefer &= and the \quad in the next line like Thorsten said.

Stefan

[gcheer3]

Thank you for you guys help.

The typeset looks good as in the pic. But there is a problem. It automatically generate a formula number "(1)" behind the formula, I dont want that number. How can I delete the formula number?

The second question I asked is kind of confusing. Sorry for that. The second questions is not related to the first question.
I am making slides using beamer. I write a paragraph, then I want to begin another paragraph, I want to show the distance betwen this two paragraph.
eg. "I appreciate all you help today and before.


It is very nice to get response online promptly."

Instead of "I appreciate all you help today and before.
It is very nice to get response online promptly"

I want extra spacing between two sentences. \par \par didnt work

[gmedina]

Use the starred versions:

Code: Select all

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{align*}
  \begin{split}
  \alpha_{\text{act}}^{\text{recalc}}=
  &\sum_{x_{11}=0}^{n_{11}}\sum_{x_{12}=0}^{n_{12}}\sum_{x_{21}=0}^{n_{21}}\sum_{x_{22}=0}^{n_{22}}
  \binom{n_{11}}{x_{11}}\binom{n_{12}}{x_{12}}\\
  &\times\binom{n_{21}}{x_{21}}\binom{n_{22}}{x_{22}}
  \pi^{x} \, (1-\pi)^{n-x}\cdot 1_{\left\{\chi^{2}\geq\chi^{2}_{1,1-\alpha}\right\}}
  \end{split}
\end{align*}

\end{document}

As Stefan_K pointed out you can use equation instead of align; in this case, equation* will do the job.

[Stefan Kottwitz]

It automatically generate a formula number "(1)" behind the formula, I dont want that number. How can I delete the formula number?

Use the corresponding starred environment: equation* or align*.

I want to show the distance betwen this two paragraph.

Just at this position you could write \bigskip or \vspace{distance}. Or you set \parskip.

Stefan

[gcheer3]

yes, \begin{equation}and\end{equation} worked well, but there is still a equation number which I dont want.

I used \\[2\baselineskip] between text, it didnt work. It worked so well in that formula. I used \\[0.5\baselineskip]. the formula turned out perfect

[gcheer3]

Sorry, Stefan, I didnt see you last post. Everything works well now.

Gmedina, Thorsten, Stefan, Thank you:-)