Modify Matplotlib Graph: Insert Data in Custom Places
Visualizing Data with Matplotlib: Adding Text, Equations, and Annotations
Matplotlib, a popular Python library for creating visualizations, offers several functions to add text, mathematical equations, labels, and annotations with arrows inside a plot. Here's a breakdown of some key functions:
- Adding simple text inside the plot: Use , where are coordinates in data units. This places arbitrary text at that position inside the axes.
- Adding axis labels and title: Use , , and to add labels to the x-axis, y-axis, and title respectively.
- Adding annotations with optional arrows: Use .
- is the point being annotated.
- is the position of the annotation text.
- is a dictionary specifying arrow style.
- Using LaTeX for mathematical formatting in text and annotations: Place your math expression inside raw strings and enclose with to render as math.
Summary of key functions:
| Purpose | Function | Notes | |-------------------------|---------------------------------------|----------------------------------| | Add simple text | | Position in data coordinates | | Add axis labels | , | Label x and y axes | | Add title | | Add plot title | | Add annotation + arrow | | Arrow pointing from text to data |
This covers adding textual information, mathematical expressions, labels, and annotated arrows inside Matplotlib plots for clear and informative visualization. The sine wave is created using the equation y = np.sin(x). The highest score is highlighted with a green label and red arrow using . The plot displays axis labels, and "Student Marks" is added to the bar chart at (3, 7). The function is used to add annotations (arrows) to a plot.
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