r - Arrange multiple ggplots from a list on multiple pages with specified page breaks -


i'm trying take plots list , output multipage pdf. can using gridextra:marrangegrob i'm having issues getting page breaks in right place. data in sets of 7 4 pages 2 plots on each page , break after 7th plot 8th starting on new page (as after 14th, 21st etc.).

my list contains (currently 84 ggplots, more in future)

i looked @ ggplot list of plots 1 pdf different page layouts don't want have set each page individually there many of them (i might want change 3 or 4 per page once have initial ones , don't want have re-work.

i've made example using diamonds dataframe, assuming want split pages plots 2 different clarities aren't on same page

egsplitdf <- diamonds %>% distinct(color, clarity) %>% arrange(clarity) egplotfun <- function(i, filterdf){   dat = filter(diamonds, color == filterdf[["color"]][i] & clarity ==         filterdf[["clarity"]][i])   ggplot(dat, aes(x= x, y = y))+        geom_point()+        labs(title = paste(filterdf[["clarity"]][i], filterdf[["color"]][i])) }  egplots <- lapply(1:56, egplotfun,filterdf = egsplitdf) arrangedplots <- marrangegrob(egplots, nrow = 2, ncol = 1) ggsave("egnotsplit.pdf", arrangedplots, height = 10,width = 7)

but has plots continuously no breaks after 7 etc. tried splitting plots list of 

plotseq <- lapply(0:8,function(x) seq(from = (x*7+1), length.out = 7)) listofplots <- lapply(plotseq, function(x) lapply(x, egplotfun, filterdf = egsplitdf )) testsplit <-marrangegrob(listofplots , nrow = 2, ncol = 1) ggsave("trysplit.pdf", testsplit, height = 10,width = 7)

but gives: "error in glist(list(list(data = list(carat = c(0.32, 1.01, 0.43, 1.22, : 'grobs' allowed in "glist""

any ideas?

try this,

enter image description here

library(gridextra) library(ggplot2)  pl <- lapply(1:84, function(i) ggplot() + ggtitle(i))  spl <- split(pl, (seq_along(pl)-1) %/% 7) ppl <- lapply(spl, function(g) marrangegrob(grobs = g, layout_matrix = matrix(c(1,2))))  pdf("test.pdf") print(ppl) dev.off()

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