Geom text

However, there are some occasions when it geom text useful to have text follow a curved path. Direct and automatic text labels that adhere to their associated line can also provide a neat alternative to legends, without the need for specifying exact label positions, and with a lower risk of overplotting. Using geomtextpath, geom text text can follow any path, and will remain correctly spaced and angled, even if you change the size and aspect ratio of your plotting device, geom text.

The goal of the geomtextpath package is to directly label line-based plots with text that is able to follow a curved path. It is an extension of the ggplot2 plotting library. The geomtextpath extension follows these ggplot2 conventions and displays the path and the text by projecting the text along the curve. All of the line-based geom layers in ggplot2 indicated below, have text and text-box equivalents in the geomtextpath package:. Each of these aims to provide the same functionality as the equivalent ggplot2 geom, but with the addition of a label aesthetic that will automatically label the line, even if it follows a curved path. However, the flexibility of ggplot2 allows that most stats can be combined with any geom.

Geom text

The text labels repel away from each other and away from the data points. If specified and inherit. You only need to supply mapping if there isn't a mapping defined for the plot. A data frame. If specified, overrides the default data frame defined at the top level of the plot. Position adjustment, either as a string, or the result of a call to a position adjustment function. There are three types of arguments you can use here:. Other arguments to the layer, for example you override the default stat associated with the layer. Amount of padding around bounding box, as unit or number. Defaults to 0.

At its most basic, this allows the label to be plotted on an arbitrary path, as shown in the following example:.

Text geoms are useful for labeling plots. They can be used by themselves as scatterplots or in combination with other geoms, for example, for labeling points or for annotating the height of bars. Set of aesthetic mappings created by aes. If specified and inherit. You must supply mapping if there is no plot mapping. If NULL , the default, the data is inherited from the plot data as specified in the call to ggplot. A data.

If specified and inherit. You must supply mapping if there is no plot mapping. If NULL , the default, the data is inherited from the plot data as specified in the call to ggplot. A data. All objects will be fortified to produce a data frame. See fortify for which variables will be created. A function will be called with a single argument, the plot data. The return value must be a data. Position adjustment, either as a string, or the result of a call to a position adjustment function.

Geom text

This article describes how to add a text annotation to a plot generated using ggplot2 package. In the last sections, examples using ggrepel extensions are provided. The function sample can be used to randomly extract 10 rows:. The grid package is required :. Facet : In the plot below, the annotation is at the same place in each facet even if the axis scales vary. We start by creating a simple scatter plot using a subset of the mtcars data set containing 15 rows.

Squirrel drawing easy

The fill aesthetic controls the background colour of the label. Useful for offsetting text from points, particularly on discrete scales. Angles across aspect ratios The mechanism underlying the text positioning will take account of the plotting window however it is rescaled. Inward always aligns text towards the center, and outward aligns it away from the center. Arguments mapping Set of aesthetic mappings created by aes. Show me some love with the like buttons below Add the following code to your website. This means text continues to stick together and follow the path at the correct angle as the plotting window changes in size or in aspect ratio. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e. The page or its content looks wrong. If NULL , the default, the data is inherited from the plot data as specified in the call to ggplot.

Text geoms are useful for labeling plots. They can be used by themselves as scatterplots or in combination with other geoms, for example, for labeling points or for annotating the height of bars.

There are three types of arguments you can use here:. Text labels will be constrained to these limits. At its most basic, this allows the label to be plotted on an arbitrary path, as shown in the following example:. Learn more about setting these aesthetics in vignette "ggplot2-specs". Text on a path The goal of the geomtextpath package is to directly label line-based plots with text that is able to follow a curved path. Note that when you resize a plot, text labels stay the same size, even though the size of the plot area changes. The fill aesthetic controls the background colour of the label. In particular, the default Windows graphics device makes text look horrible, especially when placed on paths. Note that, due to the way the grid package draws plotmath expressions, all plotmath labels will be straight rather than curved. Obviously, labels do have height and width, but they are physical units, not data units. There are three options: If NULL , the default, the data is inherited from the plot data as specified in the call to ggplot. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e. Force of attraction between a text label and its corresponding data point. Limitations There are limitations inherent in the plotting of text elements in ggplot due to the way that the underlying grid graphics handles text. You can install the development version of geomtextpath from GitHub with:.