![]() For example, let’s plot a cosine wave and put some text on it with font size 18 and red color and a black box around the text. You can also change the properties of the text like the font size using the FontSize property and the color using the Color property etc. If you specify the type as 'line', 'arrow', 'doublearrow', or 'textarrow', then the second input is the starting and ending x positions of the annotation. The first input to the function specifies the type of annotation you want to create. If you give the coordinates which don’t lie on the plot, you can’t see the text. Use the annotation function to add annotations to a chart. Simply plot the variable and then select the coordinates from the plot and then use the text() function to place the text on the selected coordinates. You need to pass the x and y coordinate on which you want to place the text. You can also use the text() function to add text with a box to the plot. ![]() Add a Text Box on a Plot Using the text() Function in MATLAB Check this link for more details about the annotation() function. In the above code, the function handle a will display all the properties of the text box on the command window, which we can change using the function handle a. Matlab provides us with various annotation types like line, arrow, textbox, etc.A = annotation( 'textbox',dimen, 'String',text, 'FitBoxToText', 'on') Any additional information that we want the reader to have about our graph can be passed as an annotation. ConclusionĪnnotation is done to make our plot more readable and intuitive. To get a simple rectangle as annotation, change the argument from ‘textbox’ to ‘rectangle’ in the above code and remove other arguments. ![]() MessageToDisplay = 'Let us learn annotation'Īnnotation('textbox', boxDimension, 'String', messageToDisplay, 'FitBoxToText', 'on') Īs we can see in the output, our plot has an annotation in the form of a text box with the required message. MessageToDisplay = ‘Let us learn annotation’Īnnotation(‘textbox’, boxDimension, ‘String’, messageToDisplay, ‘FitBoxToText,’ ‘on’) In this example, we will use the textbox annotation, which is a shapetype annotation. We have also passed the string with a message to be displayed]Īnnotation('textarrow', A, B, 'String', messageToDisplay)Īs we can see in the output, the first peak of the sine wave is being pointed, and we also have a text message displayed. Please note that the first argument, in this case, is ‘textarrow’. [Passing the above points to the annotation function. ![]() In this example, we will use the text arrow annotation to show the first incident when our sine wave touches the maximum value.Īnnotation(‘textarrow,’ A, B, ‘String’, str) In this example, we will use the double arrow annotation to show the first incident when our sine wave touches the maximum value.Īs we can see in the output, the first peak of the sine wave is being pointed out using an annotation double arrow.Īll the above annotation types help us to put a line or arrow, but what if we need text also along with the annotation line? For this purpose, we use ‘textarrow’ annotation. In this example, we will use the arrow annotation to show the first incident when our sine wave touches the maximum value.Īs we can see in the output, the first peak of the sine wave is being pointed out using an annotation arrow. Pass these points as arguments to the annotation function.Īs we can see in the output, the first peak of the sine wave is being pointed out using an annotation line.Using plot editing mode or gtext makes it easy to place a text annotation anywhere in a graph. ![]() You can also add text annotations from the command line, using the text or gtext command.
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