如何从ggplot2注释中左对齐文本 [英] How to left align text in annotate from ggplot2

问题描述

我的例子是:

qplot(mtcars$mpg) + 
  annotate(geom = "text", x = 30, y = 3, label = "Some text\nSome more text")

如何使此处的文本对齐?这样某些"彼此对齐.

How do I get the text here to be left aligned? So that the 'Some's line up with each other.

推荐答案

hjust = 0可以满足您的要求. just 代表水平对齐，0左对齐，0.5居中，1右对齐.

hjust = 0 does what you want. hjust stands for horizontal justification, 0 will be left-justified, 0.5 will be centered, and 1 will be right-justified.

qplot(mtcars$mpg) +
    annotate(geom = "text", x = 30, y = 3,
             label = "Some text\nSome more text",
             hjust = 0)

有关垂直对齐方式，另请参见vjust.

See also vjust for vertical justification.

在ggplot2中，只要设置了文本首选项，这些参数就会出现.调整主题选项时，它们适用于annotate，geom_text或element_text.

In ggplot2, these arguments are present any time text preferences are set. They work for annotate, geom_text, or in element_text when adjusting theme options.

如果您查看?geom_text，则可以找到文本字符串选项:"left"，"middle"或"right"(对于hjust)，"top"，"center"，"bottom" vjust，并且对于"inward"和"outward"，它们始终会朝着中心或从中心向内调整.

If you look at ?geom_text, you can find text string options: "left", "middle", or "right", (for hjust), "top", "center", "bottom" for vjust, and for either "inward" and "outward" which will always adjust in toward or out away from the center.

在许多base图形功能中，此行为类似，例如par的adj自变量，由text()，mtext()和title()使用，它们可以是长度为2的向量水平和垂直对齐.此外，axis()的hadj和padj自变量用于对轴垂直 h 和与轴垂直的 p 对齐.

This behavior is similar in many base graphics functions, such as the adj argument for par, used by text(), mtext(), and title(), which can be vector of length 2 for the horizontal and vertical justificatons. Also the hadj and padj arguments to axis() for justifications horizontal to and perpendicular to the axis.

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