# Documentation

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## Including Symbols in Plots and User Interfaces

This example shows how to create mathematical symbols and special characters for plots and user interfaces using Unicode characters.

### Create Unicode Characters

Create Unicode characters using the `char` function with an integer argument. Integer values for Unicode characters can be found at http://unicode-table.com/en/.

```quart = char(188); % 1/4 symbol half = char(189); % 1/2 symbol quart3 = char(190); % 3/4 aymbol piStr = char(960); % Greek letter pi phi = char(966); % Greek letter phi psi = char(968); % Greek letter psi omega = char(969); % Greek letter omega arrow = char(8594); % right arrow```

### Plot a Sin Curve

```t = 0:.1:2*pi; y = sin(.75*pi*t + .5*pi); figure('InvertHardcopy', 'off') plot(t,y) xlim([0 2*pi])```

### Add Characters to Axes and Tick Labels

You can include Unicode characters in axes labels and in tick labels.

```xlabel(['angle ' arrow]) ylabel(['sin(' omega 't + ' phi ')' arrow]) ax = gca; ax.XTick = [0:.25:2]*pi; % create tick marks at 1/4 multiples of pi ax.XTickLabel = {0, [quart piStr], [half piStr], [quart3 piStr], piStr,... ['1' quart piStr], ['1' half piStr], ['1' quart3 piStr], ['2' piStr]};```

### Add Characters to User Interfaces

Unicode characters also apply to user interface components. Set the `String` property of text, edit boxes, buttons and other uicontrols.

```ax.Position(4) = 0.75; % make the axes shorter pstr = ['Phase (' phi ' & ' psi ')']; % create the string for a text box textPhase = uicontrol('Position', [190 375 100 30], 'Style', 'text', 'FontSize', 10, 'String', pstr); editPhase = uicontrol('Position', [300 380 80 30], 'Style', 'edit', 'String', '2.5');```

### More Unicode Characters

There are many different characters, mathematical symbols, currency symbols, and languages that can be represented using Unicode characters. For more information see: http://unicode-table.com/en/.

```skull = char(9760); snowman = char(9731); textSkull = uicontrol('Position', [20 380 30 40], 'Style', 'text', 'FontSize', 25, 'String', skull); textSnowman = uicontrol('Position', [510 380 30 40], 'Style', 'text', 'FontSize', 25, 'String', snowman);```