Error in `geom_line()`: ! `mapping` must be created by `aes()` Run `rlang::last_error()` to see where the error occurred.

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22. R语言—ggplot2_线形参数geom_line大全.pdf

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在R语言的数据可视化领域，ggplot2库是一个非常强大的工具，它允许用户创建高质量、复杂的图形。本篇文章将深入探讨ggplot2中的`geom_line()`函数，这是一个用于绘制线图的关键几何对象，不仅可以生成基本的线性图表，还能实现各种自定义和扩展。让我们了解如何安装和运行ggplot2。在R环境中，你可以通过运行以下命令来安装ggplot2库： ```r install.packages("ggplot2") ``` 安装完成后，用`library()`函数加载库： ```r library(ggplot2) ``` `geom_line()`是ggplot2中的一个几何对象，它基于数据集中的连续变量绘制线条。基本的用法如下： ```r ggplot(data, aes(x = x_variable, y = y_variable)) + geom_line() ``` 在这里，`data`是你的数据框，`x_variable`和`y_variable`分别代表x轴和y轴的变量名。然而，`geom_line()`的功能远不止这些。它支持多种自定义选项，包括但不限于以下几点： 1. **颜色和样式**：你可以通过`color`和`linetype`参数改变线条的颜色和样式。例如，`color = "red"`将线条设置为红色，`linetype = "dashed"`则绘制虚线。 2. **组别**：如果你的数据包含多个类别，`group`参数可以帮助你根据特定变量分组绘制多条线。例如，`group = category_var`将根据`category_var`的值绘制不同颜色的线。 3. **透明度**：`alpha`参数可以调整线条的透明度。值范围为0（完全透明）到1（完全不透明）。 4. **数据连接方式**：默认情况下，`geom_line()`使用线性插值来连接数据点，但你可以通过`interpolate`参数更改此行为，比如使用样条曲线。 5. **数据排序**：`sort`参数允许你根据x轴或y轴值对线条进行排序。 6. **数据点**：除了线条，你还可以添加数据点，如`geom_point()`，以增强可视化效果。 7. **数据标签**：`geom_text()`或`geom_label()`可用于添加数据点的标签，提供更多信息。在实际应用中，这些参数可以组合使用，创建出复杂的可视化效果。例如，下面的代码展示了如何结合使用上述选项： ```r ggplot(data, aes(x = time, y = value, color = group, group = group)) + geom_line(linetype = "dotted", alpha = 0.7) + geom_point(shape = 21, fill = "white", size = 4) + geom_text(aes(label = id), nudge_y = 0.1) ``` 不要忘记美化你的图形，例如添加标题、标签、图例等，使用`ggtitle()`, `labs()`, 和 `theme()`函数。 `geom_line()`在ggplot2中扮演着核心角色，通过它的丰富参数和与其他几何对象的结合使用，你可以创造出各种各样的线形图表，以满足数据分析和报告的需求。在学习和实践中，不断尝试不同的组合，你会发现ggplot2的强大和灵活性。为了获取更多的技巧和示例，建议查阅ggplot2的官方文档或相关的R语言社区资源。

This error message is indicating that there is a problem with the `mapping` argument in the `geom_line()` function. The `mapping` argument must be created using the `aes()` function. To see where the error occurred, you can run the `rlang::last_error()` function in your R console. This will provide more detailed information about the error, including the line number and the specific issue with the `mapping` argument. Once you have identified the issue with the `mapping` argument, you can modify it accordingly to resolve the error.

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Error in `geom_line()`: ! `mapping` must be created by `aes()` Run `rlang::last_error()` to see where the error occurred.

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Error in geom_line(): ! Problem while setting up geom. ℹ Error occurred in the 1st layer. Caused by error in compute_geom_1(): ! geom_line() requires the following missing aesthetics: y Run rlang::last_trace() to see where the error occurred.

Error in geom_segment(): ! mapping must be created by aes()

Error in geom_line(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in FUN(): ! object 'X' not found Run rlang::last_trace() to see where the error occurred.

错误是什么：Error in geom_line(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in FUN(): ! object 'cvm' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_line(): ! Problem while computing stat. ℹ Error occurred in the 1st layer. Caused by error in setup_params(): ! stat_count() must only have an x or y aesthetic. Run rlang::last_trace() to see where the error occurred

totalplot<-cowplot::plot_grid(plotlist=plotlist,ncol=1) Error in geom_line(): ! Problem while computing aesthetics. ℹ Error occurred in the 2nd layer. Caused by error in FUN(): ! object 'EMD' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_ribbon(): ! Problem while computing aesthetics. ℹ Error occurred in the 3rd layer. Caused by error in FUN(): ! object 'lwr' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_point(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in FUN(): ! object 'BetaDL' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_bar(): ! Problem while computing aesthetics. i Error occurred in the 1st layer. Caused by error in FUN(): ! object 'weight' not found Run rlang::last_trace() to see where the error occurred.

print(p) Error in geom_boxplot(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in FUN(): ! object 'CPM' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_line() : ℹ Error occurred in the 1st layer. Caused by error in log(): ! non-numeric argument to mathematical function这个报错什么意思

Error in geom_boxplot(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in FUN(): ! object 'gene_expression' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_point(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in FUN(): ! object 'Pvalue' not found Run rlang::last_trace() to see where the error occurred.

Error in geom_smooth(): ! Problem while computing stat. ℹ Error occurred in the 2nd layer. Caused by error in compute_layer(): ! stat_smooth() requires the following missing aesthetics: y Run rlang::last_trace() to see where the error occurred.

Error in geom_area(): ! Problem while computing aesthetics. ℹ Error occurred in the 1st layer. Caused by error in year(): ! could not find function "year" Run rlang::last_trace() to see where the error occurred.、

Error in geom_bar(): ! Problem while computing stat. i Error occurred in the 1st layer. Caused by error in setup_params(): ! stat_count() requires an x or y aesthetic. Run rlang::last_error() to see where the error occurred.

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