ggpolypath | Polygons with holes for ggplot2 | Data Visualization library

by mdsumner R Version: 0.1.0 License: No License

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kandi X-RAY | ggpolypath Summary

ggpolypath is a R library typically used in Analytics, Data Visualization applications. ggpolypath has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

A ggplot2 geom for polygons with holes, called 'geom_polypath'.

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ggpolypath has a low active ecosystem.

It has 16 star(s) with 1 fork(s). There are 2 watchers for this library.

It had no major release in the last 12 months.

There are 4 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of ggpolypath is 0.1.0

Quality

ggpolypath has no bugs reported.

Security

ggpolypath has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ggpolypath does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

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ggpolypath releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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ggpolypath Key Features

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ggpolypath Examples and Code Snippets

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Community Discussions

Trending Discussions on ggpolypath

How can I use geom_sf to plot a polygon with multiple holes from coordinates?

QUESTION

How can I use geom_sf to plot a polygon with multiple holes from coordinates?

Asked 2019-Mar-04 at 23:59

I have objects with multiple holes. I can plot them successfully with geom_polypath and some geometry identification courtesy of Z.Lin. See geom_polypath(aes(x = x, y = y, group = section)) below.

I with to use geom_sf to plot these same objects. It is not clear to me how to maintain this geometry information when using sf objects.

The documentation for st_cast states:

ids integer vector, denoting how geometries should be grouped (default: no grouping)

Is that a clue? It's still not clear to me.

The xml file for the letter 'g' is here.

...

ANSWER

Answered 2019-Mar-04 at 23:46

Here's my first approach, though it feels a bit clumsy. I downloaded letter_g and made a reprex version of one_letter, so you can work with that. The first thing to do is to get a polygon for the boundary and each hole by grouping by section, but then it is a bit convoluted to erase the holes from the boundary polygon. I do it here by using st_intersection and keeping only the resulting polygon that originates entirely from the boundary. I'm also assuming that the section variable is numbered properly so that the boundary is the first set of points; if we don't know which is supposed to be the boundary I don't know how you can get the right holes.

I am not sure if this method is better than manually converting the points into the format for the st_polygon constructor.

Source https://stackoverflow.com/questions/54992896

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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Install ggpolypath

Install the development version.

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For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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