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Tile layout improvement: makes parts contiguous #68

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Tile layout improvement: makes parts contiguous #68

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1 change: 1 addition & 0 deletions R/stat-waffle.R
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Expand Up @@ -115,6 +115,7 @@ StatWaffle <- ggplot2::ggproto(
x = seq_len((ceiling(sum(.x[["values"]]) / params$n_rows)))#,
# stringsAsFactors = FALSE
) -> tdf
tdf <- snake_sort_grid(tdf)

parts_vec <- c(parts_vec, rep(NA, nrow(tdf)-length(parts_vec)))
colour_vec <- c(colour_vec, rep(NA, nrow(tdf)-length(colour_vec)))
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8 changes: 8 additions & 0 deletions R/utils.r
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Expand Up @@ -88,6 +88,14 @@ insert_unit <- function (x, values, after = length(x)) {

}

# order an expand.grid alternatingly, providing a better layout for waffle
snake_sort_grid <- function(grid){
y <- grid[[1]]
x <- grid[[2]]
o <- order(x, ifelse(x%%2 > 0, y, -y))
grid[o,]
}

# Name ggplot grid object
# Convenience function to name grid objects
#
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3 changes: 3 additions & 0 deletions R/waffle.R
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Expand Up @@ -120,6 +120,9 @@ waffle <- function(parts, rows=10, keep=TRUE, xlab=NULL, title=NULL, colors=NA,
# setup the data frame for geom_rect
dat <- expand.grid(y = 1:rows, x = seq_len(pad + (ceiling(sum(parts) / rows))))

# order the grid snake wise...
dat <- snake_sort_grid(dat)

# add NAs if needed to fill in the "rectangle"
dat$value <- c(parts_vec, rep(NA, nrow(dat) - length(parts_vec)))

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