Text Formatting ⇒ Equation small letters

[seba7207]

Hi, I have problem with equation. After compilating

Code: Select all

Code, edit and compile here:

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\be \begin{array}{l}
\frac{d\mathbf{V}_f}{dt}= - \frac{C_{Daf} S_f \rho \mathbf{V}_f^2}{2 m_f}-g\sin\gamma_f\\
\frac{d \gamma_f}{dt}=\frac{1}{\mathbf{V}_f} \left( \frac{C_{Laf}S_f\rho\mathbf{V}_{f}^2}{2m_f} -g\cos\gamma_f \right) \\
\frac{dx}{dt}=V_f\cos\gamma_f \\
\frac{dz}{dt}=V_f\sin\gamma_f\\
\frac{d x_1}{dt}=V_s-V_f\cos\gamma_f\\
\frac{d\theta_f}{dt}=\omega_{yf}\\
\frac{d\omega_{yf}}{dt}=\frac{C_{mf}S_f l_f \rho \mathbf{V}_f^2}{2I_{yf}}\\
\alpha_f=\theta_f-\gamma_f
\end{array} \label{eq:rownruchsym}
\ee \nsz
 
 
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Run LaTeX here

I have document pdf. All equations in this chapter are incorrect (all numbers are 5.0). The next problem is that some of symbols are very small in pdf document and spaces interlines are very small. My class document is
\documentclass[11pt,onecolumn,twoside,openright,b5paper]{mwbk}

[svend_tveskaeg]

A MWE is required.

[seba7207]

Code: Select all

Code, edit and compile here:

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\documentclass[11pt,onecolumn,twoside,openright,b5paper]{mwbk}
\linespread{1}
\sloppy
\setlength{\parindent}{5mm}
\setlength{\parskip}{2mm}
\textwidth 12.5cm
\textheight 18.6cm
\usepackage{polski}
\usepackage[cp1250]{inputenc}
\usepackage{pgf}
\usepackage[T1]{fontenc}
\usepackage{graphics,epsfig,subfigure,figsize}
\usepackage{amsmath,wasysym,amssymb,amsthm, multirow}
\usepackage{booktabs}
\usepackage{url}
\usepackage{longtable}
\usepackage[figuresright]{rotating}
\usepackage{overpic}
\usepackage{textcomp}
\usepackage{hyperref,url}
\usepackage[all,ps,cmtip]{xy}
\usepackage{caption}
\usepackage{srcltx}
\usepackage{epstopdf}
\usepackage{here}
\usepackage{booktabs}
\sloppy
\newcommand\be{\begin{equation}\footnotesize}
\newcommand\ee{\end{equation}}
%\newcommand{\Bold}[1]{\boldsymbol{#1}}
% Bold math symbol, use as \Bold{\alpha}
\newcommand\bef{\begin{figure}}
\newcommand\eef{\end{figure}}
\newcommand\nsz{\normalsize}
\newcommand\fsz{\footnotesize}
\newcommand\ssz{\scriptsize}
\renewcommand*{\figurename}{\bf Rys.}
\renewcommand*{\tablename}{\bf Tab.}
\newcommand*{\tablerefname}{Tabela}
 
 
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Run LaTeX here

Thanks for help

[maxmax]

I cant really see the problem. In your MWE the includes are missing, so nothings in the document. Any specific reason you are using array instead of align?

EDIT:
Ah, okay, i see the problem. What is \be,\ee and \nsz?
Why are you not using just the align environment? I have never seen this way of displaying equations, so i dont know...

[Stefan Kottwitz]

Hi,

I would not use abbreviations such as \be and \ee for beginning and ending equations: you hide the real meaning, you use commands instead environment syntax. Who should understand in the first post, what those abbreviations mean? Your second post at least shows the definitions.

Back to your equation: you wrote one equation, so you get one number only. Within the equation you used an array, LaTeX cannot know that you would like to number rows of an array. Smaller size is a result of your \newcommand\be{\begin{equation}\footnotesize}.

Here's how you could do it, using align:

Code: Select all

Code, edit and compile here:

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\begin{align}
    \frac{d\mathbf{V}_f}{dt}&= - \frac{C_{Daf} S_f \rho \mathbf{V}_f^2}{2 m_f}-g\sin\gamma_f\\
    \frac{d \gamma_f}{dt}&=\frac{1}{\mathbf{V}_f} \left( \frac{C_{Laf}S_f\rho\mathbf{V}_{f}^2}{2m_f} -g\cos\gamma_f \right) \\
    \frac{dx}{dt}&=V_f\cos\gamma_f \\
    \frac{dz}{dt}&=V_f\sin\gamma_f\\
    \frac{d x_1}{dt}&=V_s-V_f\cos\gamma_f\\
    \frac{d\theta_f}{dt}&=\omega_{yf}\\
    \frac{d\omega_{yf}}{dt}&=\frac{C_{mf}S_f l_f \rho \mathbf{V}_f^2}{2I_{yf}}\\
    \alpha_f&=\theta_f-\gamma_f
\end{align}
 
 
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Run LaTeX here

Note, & marks the equal signs for alignment.

Have a look at mathmode.pdf for learning about writing maths with LaTeX. Since you write a scientific document, I guess reading this is easy for you.

Stefan

[seba7207]

Thank,s for your help.