msaPrettyPrint {msa} | R Documentation

## Pretty-Printing of Multiple Sequence Alignments

### Description

The `msaPrettyPrint` function provides an R interface to the powerful LaTeX package texshade.sty which allows for a highly customizable plots of multiple sequence alignments.

### Usage

        msaPrettyPrint(x, y, output=c("pdf", "tex", "dvi", "asis"),
                       subset=NULL, file=NULL, alFile=NULL,
                       askForOverwrite=TRUE,  psFonts=FALSE, code=NA,
                       paperWidth=11, paperHeight=8.5, margins=c(0.1, 0.3),
                       shadingMode=c("identical", "similar", "functional"),
                       shadingModeArg=NA,
                       shadingColors=c("blues", "reds", "greens", "grays",
                                       "black"),
                       showConsensus=c("bottom", "top", "none"),
                       consensusColors=c("ColdHot", "HotCold", "BlueRed",
                                         "RedBlue", "GreenRed",
                                         "RedGreen", "Gray"),
                       consensusThreshold=50,
                       showLogo=c("top", "bottom", "none"),
                       logoColors=c("chemical", "rasmol", "hydropathy",
                                    "structure", "standard area",
                                    "accessible area"),
                       showLogoScale=c("none", "leftright", "left",
                                       "right"),
                       showNames=c("left", "right", "none"),
                       showNumbering=c("right", "left", "none"),
                       showLegend=TRUE, furtherCode=NA, verbose=FALSE)

### Arguments

`x` | an object of class `MultipleAlignment`, which includes the classes `MsaAAMultipleAlignment`, `MsaDNAMultipleAlignment`, and `MsaRNAMultipleAlignment`.
`y` | argument for restricting the output to a subset of columns; can be a numeric vector of length 2 with a lower and an upper bound or an object of class `IRanges`. If missing, the entire multiple alignment is printed.
`output` | type of output to be generated (see details below)
`subset` | can be used to specify a subset of sequences in the multiple alignment `x` if not all sequences should be printed.
`file` | name of output file; if no name is given, the name of the output file defaults to name of the object provided as argument `x` along with the proper suffix which depends on the type of output specified with the `output` argument. Note that this might lead to invalid file names if not the name of an object, but an R expression is passed as argument `x`.
`alFile` | name of alignment file to be created; `msaPrettyPrint` first writes the multiple alignment `x` to a `.fasta` file. The name of this file can be determined with the `alFile` argument. If no name is given, the name of the output file defaults to name of the object provided as argument `x` along with the suffix `.fasta`. Note that this might lead to invalid file names if not the name of an object, but an R expression is passed as argument `x`.
`askForOverwrite` | if `TRUE` (default), `msaPrettyPrint` asks whether existing files should be overwritten or not. If `askForOverwrite` is set to `FALSE`, files are overwritten without further notice.
`psFonts` | if `TRUE`, `msaPrettyPrint` produces LaTeX code that includes the LaTeX package times.sty; if `FALSE`, `msaPrettyPrint` produces LaTeX code based on the standard LaTeX fonts (default). Ignored for `output="asis"`.
`code` | this argument can be used to specify the entire LaTeX code in the `texshade` environment. This overrides all arguments that customize the appearance of the output. Instead, all customizations must be done as LaTeX commands provided by the package texshade.sty directly. This option should only be used by expert users and for special applciations in which the possibilities of the customizations of the `msaPrettyPrint` function turn out to be insufficient.
`paperWidth,paperHeight` | paper format to be used in the resulting document; defaults to 11in x 8.5in (US letter in landscape orientation). Ignored for `output="asis"`.
`margins` | a numeric vector of length 2 with the horizontal and vertical margins, respectively; the default is 0.1in for the horizontal and 0.3in for the vertical margin.
`shadingMode` | shading mode; currently the shading modes `"identical"`, `"similar"`, and `"functional"` are supported (see documentation of texshade.sty for details).
`shadingModeArg` | for shading modes `"identical"` and `"similar"`, `shadingModeArg` must be a single numeric threshold between 0 and 100 or two thresholds between 0 and 100 in increasing order. For shading mode `"functional"`, valid `shadingModeArg` arguments are `"charge"`, `"hydropathy"`, `"structure"`, `"chemical"`, `"rasmol"`, `"standard area"`, and `"accessible area"` (see documentation of texshade.sty for details).
`shadingColors` | color scheme for shading; valid `"shadingColors"` arguments are `"blues"`, `"reds"`, `"greens"`, `"grays"`, and `"black"` (see documentation of texshade.sty for details).
`showConsensus` | where to show the consensus sequence; possible values are `"bottom"`, `"top"`, and `"none"` (the latter option suppresses printing of the consensus sequence).
`consensusColors` | color scheme for printing the consensus sequence; the following choices are possible: `"ColdHot"`, `"HotCold"`, `"BlueRed"`, `"RedBlue"`, `"GreenRed"`, `"RedGreen"`, and `"Gray"` (see documentation of texshade.sty for details).
`consensusThreshold` | one or two numbers between 0 and 100, where the second one is optional and must be larger than the first one (see documentation of texshade.sty for details)
`showLogo` | where to show a sequence logo; possible values are `"top"`, `"bottom"`, or `"none"` (the latter option suppresses printing of the consensus sequence). If a sequence logo and a consensus sequence should be shown together, they can only be located at opposite sides.
`logoColors` | color scheme for printing the sequence logo; the following choices are possible: `"chemical"`, `"rasmol"`, `"hydropathy"`, `"structure"`, `"standard area"`, and `"accessible area"` (see documentation of texshade.sty for details).
`showLogoScale` | where to plot the vertical axis of the sequence logo; possible values are `"left"`, `"right"`, `"leftright"`, and `"none"` (the latter option suppresses that the axis is displayed).
`showNames` | where to print sequence names; possible values are `"left"`, `"right"`, and `"none"` (the latter option suppresses that names are displayed).
`showNumbering` | where to print sequence numbers; possible values are `"left"`, `"right"`, and `"none"` (the latter option suppresses that numbers are displayed). If sequence names and numbers should be shown together, they can only be located at opposite sides.
`showLegend` | if `TRUE` (default), a legend is printed at the end of the alignment.
`furtherCode` | additional LaTeX code to be included in the `texshade` environment; all text passed as `furtherCode` is placed between the commands created by `msaPrettyPrint` and the end of the `texshade` environment. Note the difference to the `code` argument: while the `code` argument replaces all LaTeX code in the `texshade` environment, the code passed as `furtherCode` argument is added to the LaTeX code in the `texshade` environment.
`verbose` | if `TRUE` (default), progress messages are printed and also the output of running (PDF)LaTeX (if applicable) is printed to the R session.

### Details

The `msaPrettyPrint` function writes a multiple alignment to a `.fasta` file and creates LaTeX code for pretty-printing the multiple alignment on the basis of the LaTeX package texshade.sty. If `output="asis"`, `msaPrettyPrint` prints a LaTeX fragment consisting of the `texshade` environment to the console. The parameters described above can be used to customize the way the multiple alignment is formatted. If `output="tex"`, a complete LaTeX file including preamble is created. For `output="dvi"` and `output="pdf"`, the same kind of LaTeX file is created, but processed using (PDF)LaTeX to produce a final DVI or PDF file, respectively. The `file` argument be used to determine the file name of the final output file (except for the `output="asis"` which does not create an output file).

The choice `output="asis"` is particularly useful for Sweave or knitr documents. If `msaPrettyPrint` is called with `output="asis"` in a code chunk with `results="tex"` (Sweave) or `results="asis"` (knitr), then the resulting LaTeX fragment consisting of the `texshade` environment is directly included in the LaTeX document that is created from the Sweave/knitr document.

As noted above, if they are not specified explicitly, output file names are determined automatically. It is important to point out that all file names need to be LaTeX-compliant, i.e. no special characters and spaces (!) are allowed. If a file name would be invalid, `msaPrettyPrint` makes a default choice.

Moreover, if sequence names are to be printed, there might be names that are not LaTeX-compliant and lead to LaTeX errors. In order to check that in advance, the function `msaCheckNames` is available.

Note that `texi2dvi` and `texi2pdf` always save the resulting DVI/PDF files to the current working directory, even if the LaTeX source file is in a different directory. That is also the reason why the temporary file is created in the current working directory in the example below.

### Value

`msaPrettyPrint` returns an invisible character vector consisting of the LaTeX fragment with the `texshade` environment.

### Author(s)

Ulrich Bodenhofer, Enrico Bonatesta, and Christoph Horejs-Kainrath <msa@bioinf.jku.at>

### References

http://www.bioinf.jku.at/software/msa

U. Bodenhofer, E. Bonatesta, C. Horejs-Kainrath, and S. Hochreiter (2015). msa: an R package for multiple sequence alignment. Bioinformatics 31(24):3997-3999. DOI: 10.1093/bioinformatics/btv494.

https://www.ctan.org/pkg/texshade

Beitz, E. (2000) TeXshade: shading and labeling of multiple sequence alignments using LaTeX2e Bioinformatics 16(2):135-139. DOI: 10.1093/bioinformatics/16.2.135.

### See Also

`msaCheckNames`

### Examples

    ## read sequences
    filepath <- system.file("examples", "exampleAA.fasta", package="msa")
    mySeqs <- readAAStringSet(filepath)

    ## call unified interface msa() for default method (ClustalW) and
    ## default parameters
    myAlignment <- msa(mySeqs)

    ## show resulting LaTeX code with default settings
    msaPrettyPrint(myAlignment, output="asis", askForOverwrite=FALSE)

    ## create PDF file according to some custom settings
    tmpFile <- tempfile(pattern="msa", tmpdir=".", fileext=".pdf")
    tmpFile
    msaPrettyPrint(myAlignment, file=tmpFile, output="pdf",
                   showNames="left", showNumbering="none", showLogo="top",
                   showConsensus="bottom", logoColors="rasmol",
                   verbose=FALSE, askForOverwrite=FALSE)

    ## Not run:
    library(Biobase)
    openPDF(tmpFile)
    ## End(Not run)

[Package msa version 1.18.0 Index]