How can I carry over my equation?

Question

I just write the long equation and it is wider than the page, so LaTex doesn't carry over on the next line and i need it to do somehow.For example,how can I do it with my long equation:

\begin{equation}
 min J = P(0)m_0^2+P(0) \cdot D_0^x+P(1)\cdot R_1(0)+P(2)\cdot R_1(1)+P(3)R_1(2)+ 
    \Gamma (0) L^T(0)\cdot(B^T(0)\cdotP(1)B(0)+Q)\cdot L(0)+ 
    \Gamma (1) L^T(1)\cdot(B^T(1)\cdot P(2)B(1)+Q(1))\cdot L(1)+
    \Gamma (2) L^T(2)\cdot(B^T(2)\cdotP(3)B(2)+Q(2))\cdot L(2) 
\end{equation}

The \newline cmd and \\ don't work

Related: How can I split an equation over two (or more) lines — leandriis, Dec 29 '21 at 12:59
multline works correctly if it is used as intended, if you don't show how you are using it or what output you got, it is hard to help — David Carlisle, Dec 29 '21 at 14:31

score 5 · Accepted Answer · answered Dec 29 '21 at 13:32

5

I propose this solution with aligned (without any ampersand, it is right-aligned). I took the liberty to replace Q in the second line with Q(0) (I thought you had mistyped it, but maybe I'm wrong). Also, I think the final + look better at the beginning of the following line

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation}
 \begin{aligned} \min J =P(0)m_0^2+P(0) \cdot D_0^x+P(1)\cdot R_1(0)+P(2)\cdot R_1(1)+P(3)R_1(2) \
   {} + \Gamma (0) L^T(0)\cdot\bigl(B^T(0)\cdot P(1)B(0)+Q(0)\bigr)\cdot L(0) \
   {} + \Gamma (1) L^T(1)\cdot\bigl(B^T(1)\cdot P(2)B(1)+Q(1)\bigr)\cdot L(1) \
   {} + \Gamma (2) L^T(2)\cdot\bigl(B^T(2)\cdot P(3)B(2)+Q(2)\bigr)\cdot L(2)
\end{aligned}
\end{equation}
\end{document}

answered Dec 29 '21 at 13:32

Bernard

271,350

Thank you! @Bernard, why compiler says "undefined control sequence"? I use amsmath package...Don't get it – Programmer1988 Dec 29 '21 at 13:56
@Programmer1988: I have no such message. Can you see from the .log file what the ‘undefined control sequence’ is? – Bernard Dec 29 '21 at 14:00
it's my fault, I typed \cdotP instead of \cdot P – Programmer1988 Dec 29 '21 at 14:07
Thanks a lot, i accepted your answer – Programmer1988 Dec 29 '21 at 14:07

Imran · Answer 2 · 2021-12-29T16:36:00.440

4

You may use the IEEEeqnarray environment from the IEEEtrantools package.

\documentclass{article}
\usepackage{amsmath}
\usepackage{IEEEtrantools}
\usepackage{showframe}
\begin{document}
\begin{IEEEeqnarray*}{rCl}
 \min J &=& P(0)m_0^2+P(0) \cdot D_0^x+P(1)\cdot R_1(0)+P(2)\cdot R_1(1)+P(3)R_1(2)\\
       & & \negmedspace {}+\Gamma (0) L^T(0)\cdot(B^T(0)\cdot P(1)B(0)+Q)\cdot L(0)\\
       & & \negmedspace {}+\Gamma (1) L^T(1)\cdot(B^T(1)\cdot P(2)B(1)+Q(1))\cdot L(1)\\
       & & \negmedspace {}+\Gamma (2) L^T(2)\cdot(B^T(2)\cdot P(3)B(2)+Q(2))\cdot L(2)\IEEEyesnumber\\
\end{IEEEeqnarray*}
\end{document}

Black line shows page margin.

edited Dec 29 '21 at 16:36

answered Dec 29 '21 at 13:34

Imran

3,096

it is not the array, you're wrong – Programmer1988 Dec 29 '21 at 13:46
@Programmer1988 Sorry, I didn't understand your comment. What is "not the array"? – Imran Dec 29 '21 at 13:51
5

@Programmer1988 ieeeeqnarray os an improved version of the standard eqnarray and is a viable alternative to the amsmath alignments. Your first comment here is wrong. – David Carlisle Dec 29 '21 at 14:33
1

+1. I would also replace min J with \min J. – Mico Dec 29 '21 at 15:54

score 2 · Answer 3 · edited Dec 29 '21 at 17:03

2

If conserving (vertical) space is important to you, you could place the equation in a \parbox directive and employ \linebreak directives where needed.

Oh, and I would get rid of the \cdot "crutches". If making the long expression easily parsable is an objective, I can suggest replacing the "outer" round parentheses in lines 2 to 4 with square brackets.

\documentclass{article}
\begin{document}
\begin{equation}
\min J = \parbox[t]{0.75\textwidth}{$
P(0)m_0^2+P(0)D_0^x + P(1)R_1(0) + P(2)R_1(1) + P(3)R_1(2)+ 
    \linebreak\Gamma(0) L^T(0)[B^T(0) P(1)B(0)+Q(0)] L(0)+ 
    \linebreak\Gamma(1) L^T(1)[B^T(1) P(2)B(1)+Q(1)] L(1)+
    \linebreak\Gamma(2) L^T(2)[B^T(2) P(3)B(2)+Q(2)] L(2)$}
\end{equation}
\end{document}

edited Dec 29 '21 at 17:03

Bernard

271,350

answered Dec 29 '21 at 15:51

Mico

506,678

@Bernard - Thanks for the edit! – Mico Dec 29 '21 at 23:36
1

You're welcome. You're not not the only one to have typos – some days I have almost as many as pips in a mandarin! – Bernard Dec 30 '21 at 10:28

How can I carry over my equation?

3 Answers3