![]() Looking at the string defining the title illustrates how to use these characters.Ĭontrolling the Interpretation of TEX Characters The backslash character (\) precedes all TEX character sequences. Title('\itAe^\alpha^t')['\bullet\leftarrow\.įontname \alpha<<\beta') To annotate the point where the value of t = 300, calculate the text coordinates using the function you are plotting. For example, suppose you plot the function y=Ae-αt with A = 0.25, α = 0.005, and t = 0 to 900. Text is positioned using the data units of the axes. You can use text objects to annotate axes at arbitrary locations. For information on using symbols in text strings, see Mathematical Symbols, Greek Letters, and TEX Characters. For more information about aligning text annotations, see Text Alignment.ĭefining Symbols. The HorizontalAlignment of the text string ‘sin(t) = -.707 \rightarrow’- is set to right to place it on the left side of the point on the graph. The following code adds annotations at three data points on a graph. You can also calculate the positions of text annotations in a graph. Draw an arrow from each block of text to point to the lines, as shown here.Ĭalculating the Positions of Text Annotations (Type plotedit again or click the icon again when you want to exit plot edit mode.) In the Command Window or by clicking the Edit Plot icon in the figure toolbar. First enter plot edit mode, either by typing plotedit To connect the text with the appropriate points on the plot, draw two annotation arrows by hand. Title('Lotka-Volterra Predator-Prey Population Model'. % Center a legend at the top of the graph % Set DisplayNames for the lines for use by the legend % Plot the two curves, storing handles to them It also illustrates how to create multiline text annotations using cell arrays (also see the following section Text in Cell Arrays). The following example adds text annotation, a title, and a legend to a graph of output from the Lotka-Volterra predator-prey population model. Use the gtext function when you want to position a text annotation at a specific point in the data space with the mouse. To create a text annotation using the text function, you must specify the text and its location within the axes, providing the x- and y-coordinates in the same Units that the graph uses (pixels, normalized, etc.). ![]() ![]() Creating Text Annotations with the text or gtext Function For more information, see Positioning Annotations in Data Space. If you move or resize your axes, you will have to reposition your text annotations. Text annotations created in plot edit mode are not. Text annotations created using the text or gtext function are anchored to the axes. ![]() Use the text function when you want to position a text annotation at a specific point within an axes for which you know the coordinates. Using plot editing mode or gtext makes it easy to place a text annotation where you want in a graph. You can also add text annotations from the command line, using the text or gtext function. To insert textarrow annotations, you first drag out an arrow from tail to head, then type the text at the text cursor next to the tail, When you enable plot editing, you can create text annotations by selecting the appropriate kind of annotation from the Insert menu, clicking in the graph or the figure background and then entering text. You can add free-form text annotations anywhere in a MATLAB figure to help explain your data or bring attention to specific points in your data sets.Īs the following example shows, annotating a graph manually is easy in plot edit mode. The text can be in any installed text font, and can include TeX or LaTeX markup. The box can have a border and a background, or be invisible. Text annotations are boxes containing text strings that you compose. ![]()
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