Package 'cptcity'

Function to return colour palettes functions from 'cpt-city'

Description

This function return a collor palette based on the name or position of the palette.

Usage

cpt(
  pal = "mpl_inferno",
  n = 100,
  colorRampPalette = FALSE,
  rev = FALSE,
  frgb = rep(1, 3)
)

Arguments

pal	Palette of colors available or the number of the position
n	integer; number of colors
colorRampPalette	Logical; to be used in sf and mapview.
rev	Logical; to internally revert order of rgb color vectors.
frgb	Numeric; vector of 3 to change internal rgb composition. The order is red, green, blue

Details

The cpt-city web archive comes from: http://soliton.vm.bytemark.co.uk/pub/cpt-city/index.html

Value

A colour palette function.

Examples

{
library(cptcity)
image(matrix(1:100), col = cpt(pal = "mpl_inferno"))
find_cpt("temperature")
image(matrix(1:100), col = cpt("idv_temperature"))
image(matrix(1:100), col = cpt("idv_temperature", rev = TRUE))
## Not run: 
# Do not run
library(ggplot2)
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density))

 ggplot(faithfuld, aes(waiting, eruptions)) +
 geom_raster(aes(fill = density)) +
 scale_fill_gradientn(colours = cpt(n = 100))

## End(Not run)
}

---

Names of the 7140 color gradients of cptcity R Package

Description

This dataset os a vector with al the names of the gradients of the archive cptcity (http://soliton.vm.bytemark.co.uk/pub/cpt-city/) availale in this package. Please, read the documentation of each color gradient in the web page shown above.

Usage

data(cpt_names)

Format

A vector with the 7140 names of the color gradients

Source

http://soliton.vm.bytemark.co.uk/pub/cpt-city/

---

A package to return colour gradients from CPTCITY

Description

Colour palettes comes from http://soliton.vm.bytemark.co.uk/pub/cpt-city/index.html Rhw function cpt has two arguments n for the numbers and pal for the name or number of the palette:

Details

The palettes are available here: http://soliton.vm.bytemark.co.uk/pub/cpt-city/index.html

---

Function to return colour palettes names

Description

find_cpt returns the name of the colour gradient that satisfy the search. It is a searcher. It is a mini mini mini google.

Usage

find_cpt(name)

Arguments

name	character; Word to be searched among the names of the cpt gradients.

Value

names that satisfy the search.

Note

This functions runs grep.

Examples

{
library(cptcity)
find_cpt("temperature")
image(matrix(1:100), col = cpt("idv_temperature"))
## Not run: 
library(cptcity)
# Do not run
# data names_cpt lazy loaded, already in environment
library(ggplot2)
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density))

find_cpt("radar")
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density)) +
scale_fill_gradientn(colours = cpt(n = 10, "ncl_radar"))

find_cpt("rain")
ggplot(faithfuld, aes(waiting, eruptions)) +
geom_raster(aes(fill = density)) +
scale_fill_gradientn(colours = cpt(pal = "pj_1_a_rainbow"))

## End(Not run)
}

---

Random colour gradient!

Description

Based on "I'm Feeling Lucky" from Google. As this package includes 7140 colour gradients, it might be hard to find the 'right'

Usage

lucky(
  n = 100,
  colorRampPalette = FALSE,
  rev = FALSE,
  message = TRUE,
  nseed,
  frgb = rep(1, 3)
)

Arguments

n	integer; number of colors
colorRampPalette	Logical; to be used in sf and mapview.
rev	Logical; to internally revert order of rgb color vectors.
message	Logical; for printing or not the name of the colour gradient
nseed	integer; for reproducing the same colour gradient. See set.seed
frgb	Numeric; vector of 3 to change internal rgb composition The order is red, green, blue

Details

The cpt-city web archive comes from: http://soliton.vm.bytemark.co.uk/pub/cpt-city/index.html

Value

A RANDOM colour palette function including name of the colour gradient and number.

Examples

{
library(cptcity)
image(matrix(1:100), col = lucky())
image(matrix(1:100), col = lucky())
image(matrix(1:100), col = lucky())
image(matrix(1:100), col = lucky())
image(matrix(1:100), col = lucky())
image(matrix(1:100), col = lucky(rev = TRUE))
image(matrix(1:100), col = lucky(nseed = 1))
}

---

Show me some colors!

Description

show_cpt returns a color matrix which prints and show the colors

Usage

show_cpt(x, label = TRUE)

Arguments

x	character; names of the cpt gradients.
label	Logical, to show labels or not.

Value

names color matrix

Examples

{
library(cptcity)
show_cpt(find_cpt("radar"))
}

---