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POSaving multiple ggplots from ls into one and separate files in R
 

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  1. POSaving multiple ggplots from ls into one and separate files in R
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    <p>I have several ggplots as objects on my ls. I want to save them as separate files (although I would also be interested to know how to save them all under 1 big file). I have read this: <a href="https://stackoverflow.com/questions/5796508/loop-through-ls-or-objects">question</a> and <a href="https://stackoverflow.com/questions/1395410/how-to-print-r-graphics-to-multiple-pages-of-a-pdf-and-multiple-pdfs">question</a> but I can't seem to adapt the code. I also tried to plot them all in one big file as suggested <a href="https://stackoverflow.com/questions/12234248/printing-multiple-ggplots-into-a-single-pdf-multiple-plots-per-page">here</a> but do get this error: <code>Error in do.call("grid.arrange", plots2[[i]]) : second argument must be a list</code>. There's something that I am missing in getting all the ggplots in one list.</p> <p>This is what I've tried so far:</p> <pre><code>&gt; ls() #List of objects on my ls. All the p* are my ggplots that I want to save. [1] "all" "dat" "dat2" "dat3" "data" "dlook" "dlook2" "dlook3" "i" "look2" "mdfx" [12] "objects" "order" "p" "p1" "p10" "p11" "p12" "p13" "p14" "p15" "p16" [23] "p17" "p18" "p19" "p2" "p3" "p4" "p5" "p6" "p7" "p8" "p9" &gt; objects&lt;-ls() &gt; plot&lt;-objects[14:30] &gt; plots [1] "p1" "p10" "p11" "p12" "p13" "p14" "p15" "p16" "p17" "p18" "p19" "p2" "p3" "p4" "p5" "p6" "p7" "p8" "p9" &gt; class(plots) [1] "character" plots2&lt;-as.list(plots)#Transform into a list. library(gridExtra) #Code suggested to create one pdf file. pdf("test.pdf", onefile = TRUE) for (i in seq(length(plots2))) { do.call("grid.arrange", plots2[[i]]) } dev.off() </code></pre>
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    1. COYour link to the second question points to the same as the first. Also, are you trying to print one plot per page of a pdf, or arrange them on one page together?
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    2. COOups sorry about that will fix this. I would like to know how to do both options 1) separate pdfs and 2) all in one big pdf, one plot per page.
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    3. COAt the point you're at, you probably want `mget` (also note that `ls` will let you use regex to find items). But it would probably have been simpler (and cleaner) to put all the plots in a pre-allocated list in the first place.
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