Geom text

Text geoms are useful for labeling plots.

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.

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. The mechanism underlying the text positioning will take account of the plotting window however it is rescaled. 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 all done in the background, without the need to call your plotting code again every time the window is resized. For example, here is the same plot drawn with different dimensions:.

Limits for the x and y axes. All objects will be fortified to geom text a data frame, geom text. Acknowledgments The authors would like to thank Patrick Plenefisch for posting the Stackoverflow question that prompted them to develop this package, and for raising some important issues early in its development.

However, there are some occasions when it is 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, your 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. It does so without the need to redraw your plot each time, as shown in the introduction vignette. You can install the development version of geomtextpath from GitHub with:.

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.

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 :.

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Defaults to NA , which means that set. The measurements are stored, along with the x, y values of the path and any graphics parameters such as color, linewidth and font. For short text labels applied to long paths, we need a parameter to control how far along the path the text is placed. NA , the default, includes if any aesthetics are mapped. Defaults to 0. Amount of padding around bounding box, as unit or number. You can read more about text positioning in the aesthetics vignette. This happens because the "width" and "height" of a text element are 0. Often, a reference line added to a plot requires a text annotation. Network Analysis and Visualization in R.

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.

The page or its content looks wrong. It can also be a named logical vector to finely select the aesthetics to display. Default unit is lines, but other units can be specified by passing unit x, "units". It is important to realise that the letters are only rotated, and do not undergo any change in shape. See fortify for which variables will be created. The best way to show this is with a head-to-head comparison. Text paths in polar coordinates Straight text paths in Cartesian coordinates become curved in polar coordinates. The details of the display are described in? If NULL , the default, the data is inherited from the plot data as specified in the call to ggplot. There are limitations inherent in the plotting of text elements in ggplot due to the way that the underlying grid graphics handles text. You must supply mapping if there is no plot mapping. By default, any labels that would have been upside down or even mostly upside down are automatically flipped to be facing in a legible direction. Each of these aims to replicate all the functionality of the equivalent ggplot2 function, but with direct text labels that follow the shape of the lines drawn. This happens because the "width" and "height" of a text element are 0.