# code.mindmeldr.com /graphterm

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# Using GraphTerm with R

GraphTerm supports basic inline graphics display and the notebook interface using R. The file $GTERM_DIR/bin/gterm.R includes helper functions for using the GraphTerm API to display inline graphics. The following `R` packages need to be installed: `RCurl`, `Cairo`, and `png`. On Linux, the following additional libraries, or their equivalents, may need to be installed: `libcurl4-openssl-dev libcairo2-dev libxt-dev`. Here’s a plotting example:

    $ R -q
    install.packages(c("RCurl", "Cairo", "png"))  # The first time
    gterm <- paste(Sys.getenv("GTERM_DIR"),"/bin/gterm.R", sep="")
    source(gterm)          # Load GraphTerm API helper functions
    g <- gcairo()          # Initialize Cairo device for GraphTerm output
    x <- rnorm(100,0,1)
    hist(x, col="blue")
    g$frame()              # Display plot as inline image
    hist(x, col="red")
    g$frame(TRUE)          # Overwrite previous plot
    hist(x, col="green")
    g$frame()              # New plot

The notebook mode of GraphTerm will also work with `R`, without any additional software. GraphTerm can open Markdown files (in a format very similar to R-markdown) as a notebook, and also saves notebooks using the same format. The file `$GTERM_DIR/notebooks/R-histogram.R.md` contains a sample notebook displaying inline graphics (see Inline plotting with R). To open the notebook, click on it in the `gls` output, or use the notebook/open menu option after starting `R`.

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