How to use swift charts
Generated on 3/6/2025
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To use Swift Charts, particularly for creating vectorized and function plots, you can follow these steps:
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Function Plots: Swift Charts allows you to plot mathematical functions using the new line plot and area plot APIs. You can visualize a single function or the area between two functions. For example, you can plot a normal distribution curve by defining a function that calculates the points on the curve and using the line plot API to render it. You can customize the appearance of your plots using modifiers, similar to SwiftUI.
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Advanced Function Plots: You can create more advanced plots by visualizing the area between two functions or plotting parametric functions where x and y are defined in terms of a third variable. Swift Charts automatically infers the domain by sampling the function, but you can customize the x and y scales to focus on specific parts of the function.
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Vectorized Plots: These are useful for larger datasets where the entire plot is customized with the same modifiers and properties. You can use the mark API for fewer data points that require individual customization. Vectorized plots can be more efficient by grouping data by style and avoiding unnecessary computations during rendering.
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Best Practices: When using vectorized plots, you can improve performance by using stored properties instead of computed properties, specifying known styles and bounds, and skipping unnoticeable style customizations for large datasets.
For more detailed guidance, you can refer to the session Swift Charts: Vectorized and function plots (00:01:01) which covers function plots, and Swift Charts: Vectorized and function plots (00:06:48) for vectorized plots.
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