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README.Rmd
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---
title: "cptcity package"
author: "Sergio Ibarra-Espinosa"
date: "`r Sys.Date()`"
output: github_document
always_allow_html: true
---
[](https://ci.apalettepveyor.com/project/ibarraespinosa/cptcity)
[](https://zenodo.org/badge/latestdoi/120517547)
[](https://codecov.io/github/ibarraespinosa/cptcity?branch=master)
[](http://cran.rstudio.com/web/packages/cptcity/index.html)
[](http://www.rdocumentation.org/packages/cptcity)
[](http://cran.r-project.org/web/packages/cptcity)
[](http://cran.r-project.org/package=cptcity)
## A package to return colour gradients from CPTCITY
Colour palettes comes from http://soliton.vm.bytemark.co.uk/pub/cpt-city/index.html
Currently there are 7140 colour gradients. To se the names type `cpt_names`.
There are three functions:
1) `find_cpt`: To search the name of the colour gradient.
Example:
```{r}
library(cptcity)
find_cpt("radar")
```
2) `show_cpt`: Visually selectyour palette
```{r}
pals <- find_cpt("radar")
show_cpt(pals)
```
3) `cpt`: To return the colour gradient.
```{r}
cptcity::cpt(pal = "ncl_radar_1", n = 100)
```
4) `lucky`: To choose a random colour gradient
```{r}
cptcity::lucky(n = 100)
```
## Install and use it!
```{r eval = T}
# install.packages("cptcity") 1.0.6
# remotes::install_github("ibarraespinosa/cptcity")
packageVersion("cptcity")
library(cptcity)
image(matrix(1:100), col = cpt(pal = "mpl_inferno"))
```
## ggplot2
And you can use it ggplot2
```{r}
library(cptcity)
library(ggplot2)
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density))
```
```{r}
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density)) +
scale_fill_gradientn(colours = cpt())
```
## raster
```{r}
library(cptcity)
library(raster)
f <- system.file("external/test.grd", package="raster")
r <- raster(f)
spplot(r, scales = list(draw = T))
```
```{r}
spplot(r, scales = list(draw = T),
col.regions = rev(cpt(n = 100, pal = "colo_Skyblue2u_Gentle_Waves")))
```
## sf
```{r}
library(cptcity)
library(sf)
nc = st_read(system.file("shape/nc.shp", package="sf"))
plot(nc["AREA"], pal = cpt(colorRampPalette = T))
```
## mapview
```{r, eval = F}
library(cptcity)
library(mapview)
library(sf)
nc = st_read(system.file("shape/nc.shp", package="sf"))
mapview(nc, zcol = "AREA", col.regions = cpt(colorRampPalette = T), legend = T)
```
## stars
```{r}
library(cptcity)
library(stars)
tif = system.file("tif/L7_ETMs.tif", package = "stars")
(x1 = read_stars(tif))
br <- classInt::classIntervals(var = x1$L7_ETMs.tif,
n = 100,
style = "sd")
plot(x1,
axes = TRUE,
lty = 0,
col = cptcity::cpt(rev = TRUE,
pal = 819,
n = length(br$brks) - 1),
key.pos = 2,
breaks = br$brks
)
```
## terra
```{r}
library(cptcity)
library(terra)
f <- system.file("ex/elev.tif", package="terra")
r <- rast(f)
image(r, col = cptcity::lucky())
# Colour gradient: dca_alarm.p4.0.1, number: 1115
```
# **I included a random colour gradient function!**
```r
# install.packages("cptcity")
# devtools::install_github("ibarraespinosa/cptcity")
library(cptcity)
image(matrix(1:100), col = lucky())
```
## COPYING
Each palette has a COPYING.XML files available at ins/extdata. To see each file do:
```r
library(cptcity)
files <- list.files(system.file("extdata",
package = "cptcity"),
pattern = ".xml",
recursive = T,
full.names = T)
# For instance, the COPYING files of "arendal" is
files[1]
# and the file
readLines(files[1])
1] "/usr/local/lib/R/site-library/cptcity/extdata/arendal/COPYING.xml"
[1] "<?xml version=\"1.0\"?>"
[2] "<copying>"
[3] " <authors>"
[4] " <author href=\"http://www.grida.no/graphicslib/\">"
[5] " <name>GRID-Arendal</name>"
[6] " </author>"
[7] " </authors>"
[8] " <license>"
[9] " <informal>"
[10] " Attribution and linkback requested."
[11] " </informal>"
[12] " <year>2014</year>"
[13] " <text>"
[14] " Using this graphic and referring to it is encouraged, "
[15] " and please use it in presentations, web pages, newspapers, "
[16] " blogs and reports."
[17] ""
[18] " For any form of publication, please include the link to "
[19] " this page and give the cartographer/designer credit."
[20] " </text>"
[21] " </license>"
[22] " <src>"
[23] " <format>PNG images</format>"
[24] " <link href=\"http://www.grida.no/graphicslib/detail/mean-surface-temperature_c7e4\""
[25] "\t >Temperature</link>"
[26] " <link href=\"http://www.grida.no/graphicslib/detail/arctic-topography-and-bathymetry_5645\""
[27] "\t >Arctic bathymetry</link>"
[28] " <link href=\"http://www.grida.no/graphicslib/detail/map-of-zimbabwe_36a5\""
[29] "\t >Zambezi</link>"
[30] " </src>"
[31] " <distribute>"
[32] " <qgis distribute=\"yes\" license=\"other\"/>"
[33] " </distribute>"
[34] "</copying>"
```