Description: Error bar caps are visual elements added to the ends of error bars in graphs, commonly used in data visualization libraries such as Matplotlib in Python. These caps are graphical representations that indicate the range of uncertainty or variability in the presented data. Their main function is to provide a clear and concise representation of the measurement accuracy, allowing observers to quickly interpret the reliability of the data. Caps can vary in length and style, and their design can be customized to meet the specific needs of the graph. By including caps on error bars, the visual communication of results is enhanced, facilitating the understanding of the inherent variability in the data. This is especially relevant in fields such as science, engineering, and statistics, where data accuracy is crucial for informed decision-making. In summary, error bar caps are an essential component in data visualization, as they add an additional level of information that helps users assess the quality and reliability of the presented data.