Set up proportions of each colour

[yiqi171717]

Hi Koen, I'm trying your package to generate some cover pictures for our school newsletter and I wonder if it's possible at all to set the proportion of each colour in the artwork? We did a survey of everyone's favourite colour and would like to turn these statistics into some art :)
Thanks a lot!

[koenderks]

Hi @yiqi171717,

Sounds like a cool idea! I think a good attempt would be to first create a vector of colors that has the appropriate proportions in it, like is shown below. In the vector colors, the color blue occurs (approximately) 30%, red occurs 20%, and yellow occurs 50% of the times.

set.seed(1)
colors <- sample(c("blue", "red", "yellow"), size = 1000, prob = c(0.3, 0.2, 0.5), replace = TRUE)

Next, you can use this color vector in one of the functions. For example:

aRtsy::canvas_flow(colors = colors, lwd = 0.5)

Hope this helps! :)

[yiqi171717]

Hi @koenderks !
Thanks a lot for your rapid reply! Does your function take in hex codes? Because I already tried something similar to your suggestion: I cleaned up the survey results, pulled the hex code column as a vector and used that as the input colour palette. However that just generated an error :/

[koenderks]

Oh hmm that is unusual... I believe it should also work with hex codes. For example,

set.seed(1)
colors <- sample(c("#F4EFD6", "#267029", "#422670"), size = 1000, prob = c(0.3, 0.2, 0.5), replace = TRUE)
aRtsy::canvas_flow(colors = colors, lwd = 0.5)

gives me:

Which function are you using, and what is the error message you get?

[yiqi171717]

So I have a data frame, colours.df, with 50 rows (50 answers). One column is the name of the colour and the other is the hex code (named "hex").

hex <- pull(colours.df, hex)
artwork <- canvas_strokes(colors = hex)

it gave me almost instantly an error message "Error in draw_strokes(X = canvas, neighbors = neighborsLocations, s = length(colors), :
function 'Rcpp_precious_remove' not provided by package 'Rcpp' "

[koenderks]

It seems an issue with the version of 'Rcpp'. Maybe updating the package using 'install.packages("Rcpp")' will solve this problem!

[yiqi171717]

you're right, I updated Rcpp and it all works fine now! Thank you so much for your help, it's such a fun package to use :D

[yiqi171717]

Issue11_cover_watercolour.pdf
the end product ;) (proper citation follows inside the issue)
thanks again for all your help!

[koenderks]

Awesome, this looks really cool and makes my day! Thank you for sharing :)