Passing a vector to grid.arrange as a list of arguments.

问题

So I'm trying to use a vector to recapitulate this command, which works well on my data

grid.arrange(Sig1.plot,Sig2.plot,Sig3.plot,Sig4.plot).

The vector is

> Plots.restricted
[1] "Sig1.plot,Sig2.plot,Sig3.plot,Sig4.plot"

> class(Plots.restricted)
[1] "character"

However, doing

grid.arrange(as.name(Plots.restricted),ncol=1) 

returns the following error

Error in arrangeGrob(..., as.table = as.table, clip = clip, main = main,  : 
input must be grobs!

Alternatively, I tried

Plots.reference<-   paste(c(rep("Sig",ncol(Signatures)-1)),c(2:ncol(Signatures)-1),c(rep(".plot",ncol(Signatures)-1)),sep="",collapse=",")

where Plots.reference now produces a character vector of length 1.

grid.arrange(as.name(Plots.reference)) and grid.arrange(as.symbol(Plots.reference))

though continue to return the error.

What am I doing wrong?

回答1:

You can try this:

 do.call(grid.arrange, lapply(Plots.restricted, as.name))

or alternatively:

 do.call(grid.arrange, lapply(Plots.restricted, get))

来源：https://stackoverflow.com/questions/21611441/passing-a-vector-to-grid-arrange-as-a-list-of-arguments