How do I label the bars in my bar graph in MATLAB? (2025)
Before MATLAB R2019b, it is possible to programmatically add text labels above the bars on a plot. These labels can be used to indicate any interesting features of the data set, such as statistical significance or the associated p-values of each bar.This can be done using a "for" loop that loops over each bar in the plot and adds an appropriate label using the "text" function. Refer to the following example code for a simple demonstration on how to do this:
Note that if labels are desired for groups of bars, the x coordinates passed to the "text" function will need to be modified so that the text is placed over the correct bar. This can be done in a similar manner but taking into account that "hbar" in the above code is a vector of handles, and that the x and y coordinates of the text label must be adjusted for each group.
To add text to one point, specify x and y as scalars. To add text to multiple points, specify x and y as vectors with equal length. text( x , y , z , txt ) positions the text in 3-D coordinates.
They must contain the following information: A title explaining what the bar chart means.Labels that tell you what each bar means. This could be a key or just a label underneath the line that runs along the bottom of the bar graph (the horizontal axis).
To specify a label, use a character vector or a string scalar. To specify a sublabel, use a two-element cell array of character vectors or a two-element string array: The first element is the name of the parent label. The second element is the name of the sublabel.
Captions should be concise but comprehensive. They should describe the data shown, draw attention to important features contained within the figure, and may sometimes also include interpretations of the data. Figures are typically read from the bottom up, so captions go below the figure and are left-justified.
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