Matlab中使用LaTeX字符编辑数学公式

Matlab中使用LaTeX字符编辑数学公式

1. Using LaTaX to format math equations

引自：

/cn/help/matlab/creating_plots/adding-text-annotations-to-graphs.html

The LaTeX markup language evolved from TeX, and has a superset of its capabilities. LaTeX gives you more elaborate control over specifying and styling mathematical symbols.

Latex排版语言源自于Tex，拥有独特的魅力；它能够使你轻易的生成精美的规范格式的数学符号。

The following example illustrates some LaTeX typesetting capabilities when used with the text function. Because the default interpreter is for TeX, you need to specify the parameter-value pair 'interpreter','latex' when typesetting equations such as are contained in the following script:

下面的例子用来介绍一些在文本标注中使用LaTeX排版功能，由于文本标签中的默认解释程序语言为TeX，在利用LaTeX语言编辑包含下列脚本中的一些数学方程的时候，就得需要把文本标签的参数‘interpreter’设置为‘latex’：

%% LaTeX Examples--Some well known equations rendered in LaTeX

%

figure('color','white','units','inches','position',[2 2 4 6.5]);

axis off

%% A matrix（矩阵）; LaTeX code is

% \hbox {magic(3) is } \left( {\matrix{ 8 & 1 & 6 \cr

% 3 & 5 & 7 \cr 4 & 9 & 2 } } \right)

h(1) = text('units','inch', 'position',[.2 5], ...

'fontsize',14, 'interpreter','latex', 'string',...

['$$\hbox {magic(3) is } \left( {\matrix{ 8 & 1 & 6 \cr'...

'3 & 5 & 7 \cr 4 & 9 & 2 } } \right)$$']);

%% A 2-D rotation transform（坐标旋转）; LaTeX code is

% \left[ {\matrix{\cos(\phi) & -\sin(\phi) \cr

% \sin(\phi) & \cos(\phi) \cr}}

% \right] \left[ \matrix{x \cr y} \right]

%

% $$ \left[ {\matrix{\cos(\phi)

% & -\sin(\phi) \cr \sin(\phi) & \cos(\phi) % \cr}}

% \right] \left[ \matrix{x \cr y} \right] $$

%

h(2) = text('units','inch', 'position',[.2 4], ...

'fontsize',14, 'interpreter','latex', 'string',...

['$$\left[ {\matrix{\cos(\phi) & -\sin(\phi) \cr'...

'\sin(\phi) & \cos(\phi) \cr}} \right]'...

'\left[ \matrix{x \cr y} \right]$$']);

%% The Laplace transform（拉普拉斯变换）; LaTeX code is

% L\{f(t)\} \equiv F(s) = \int_0^\infty\!\!{e^{-st}f(t)dt}

% $$ L\{f(t)\} \equiv F(s) = \int_0^\infty\!\!{e^{-st}f(t)dt} $$

% The Initial Value Theorem for the Laplace transform:

% \lim_{s \rightarrow \infty} sF(s) = \lim_{t \rightarrow 0} f(t)

% $$ \lim_{s \rightarrow \infty} sF(s) = \lim_{t \rightarrow 0}

% f(t) $$

%

h(3) = text('units','inch', 'position',[.2 3], ...

'fontsize',14, 'interpreter','latex', 'string',...

['$$L\{f(t)\} \equiv F(s) = \int_0^\infty\!\!{e^{-st}'...

'f(t)dt}$$']);

%% The definition of e（e的定义）; LaTeX code is

% e = \sum_{k=0}^\infty {1 \over {k!} }

% $$ e = \sum_{k=0}^\infty {1 \over {k!} } $$

%

h(4) = text('units','inch', 'position',[.2 2], ...

'fontsize',14, 'interpreter','latex', 'string',...

'$$e = \sum_{k=0}^\infty {1 \over {k!} } $$');

%% Differential equation（微分方程）

% The equation for motion of a falling body with air resistance

% LaTeX code is

% m \ddot y = -m g + C_D \cdot {1 \over 2} \rho {\dot y}^2 \cdot A

% $$ m \ddot y = -m g + C_D \cdot {1 \over 2} \rho {\dot y}^2

% \cdot A $$

%

h(5) = text('units','inch', 'position',[.2 1], ...

'fontsize',14, 'interpreter','latex', 'string',...

['$$m \ddot y = -m g + C_D \cdot {1 \over 2}'...

'\rho {\dot y}^2 \cdot A$$']);

%% Integral Equation（积分方程）; LaTeX code is

% \int_{0}^{\infty} x^2 e^{-x^2} dx = \frac{\sqrt{\pi}}{4}

% $$ \int_{0}^{\infty} x^2 e^{-x^2} dx = \frac{\sqrt{\pi}}{4} $$

%

h(6) = text('units','inch', 'position',[.2 0], ...

'fontsize',14, 'interpreter','latex', 'string',...

'$$\int_{0}^{\infty} x^2 e^{-x^2} dx = \frac{\sqrt{\pi}}{4}$$');