plotArrow {mixOmics} | R Documentation

## Arrow sample plot

### Description

Represents samples from multiple coordinates.

### Usage

    plotArrow(  object,
    comp = NULL,
    abline = FALSE,
    xlim = NULL,
    ylim = NULL,
    group=NULL,
    col,
    cex,
    pch,
    title=NULL,
    plot.arrows=TRUE,
    legend=FALSE,
    X.label = NULL,
    Y.label = NULL,
    ind.names=FALSE,
    position.names='centroid'
    )

### Arguments

`object` | object of class inheriting from mixOmics: `PLS, sPLS, rCC, rGCCA, sGCCA, sGCCDA`
`comp` | integer vector of length two indicating the components represented on the horizontal and the vertical axis to project the individuals.
`abline` | should the vertical and horizontal line through the center be plotted? Default set to `FALSE`
`xlim` | the ranges to be encompassed by the x axis, if `NULL` they are computed.
`ylim` | the ranges to be encompassed by the y axis, if `NULL` they are computed.
`group` | factor indicating the group membership for each sample. Coded as default for the supervised method `sGCCDA, sPLSDA`, but needs to be input for the unsupervised methods `PLS, sPLS, rCC, rGCCA, sGCCA`
`col` | character (or symbol) color to be used, color vector also possible.
`cex` | numeric character (or symbol) expansion, , color vector also possible.
`pch` | plot character. A character string or a vector of single characters or integers. See `points` for all alternatives.
`title` | set of characters for the title plot.
`plot.arrows` | boolean. Whether arrows should be added or not. Default is `TRUE`.
`legend` | boolean. Whether the legend should be added. Only for the supervised methods and if group!=NULL. Default is `FALSE`.
`X.label` | x axis titles.
`Y.label` | y axis titles.
`ind.names` | If `TRUE`, the row names of the first (or second) data matrix are used as sample names (see Details). Can be a vector of length the sample size to display sample names.
`position.names` | One of `"centroid", "start", "end"`. Define where sample names are plotted when `ind.names=TRUE`. In a multiblock analysis, centroid and start will display similarly.

### Details

Graphical of the samples (individuals) is displayed in a superimposed manner where each sample will be indicated using an arrow. The start of the arrow indicates the location of the sample in X in one plot, and the tip the location of the sample in Y in the other plot.

For objects of class `"GCCA"` and if there are more than 3 blocks, the start of the arrow indicates the centroid between all data sets for a given individual and the tips of the arrows the location of that individual in each block.

Short arrows indicate a strong agreement between the matching data sets, long arrows a disagreement between the matching data sets.

### Value

none

### Author(s)

Francois Bartolo, Kim-Anh Lê Cao.

### References

Lê Cao, K.-A., Martin, P.G.P., Robert-Granie, C. and Besse, P. (2009). Sparse canonical methods for biological data integration: application to a cross-platform study. BMC Bioinformatics 10:34.

### See Also

`arrows`, `text`, `points` and http://mixOmics.org/graphics for more details.

### Examples

    ## plot of individuals for objects of class 'rcc'
    # ----------------------------------------------------
    dev.off()
    data(nutrimouse)
    X <- nutrimouse$lipid
    Y <- nutrimouse$gene
    nutri.res <- rcc(X, Y, ncomp = 3, lambda1 = 0.064, lambda2 = 0.008)

    plotArrow(nutri.res)

    # names indicate genotype
    plotArrow(nutri.res,
    group = nutrimouse$genotype, ind.names = nutrimouse$genotype)

    plotArrow(nutri.res, group = nutrimouse$genotype,
    legend = TRUE)

    ## Not run:
    ## plot of individuals for objects of class 'pls' or 'spls'
    # ----------------------------------------------------
    data(liver.toxicity)
    X <- liver.toxicity$gene
    Y <- liver.toxicity$clinic
    toxicity.spls <- spls(X, Y, ncomp = 3, keepX = c(50, 50, 50),
    keepY = c(10, 10, 10))

    #default
    plotArrow(toxicity.spls)

    # colors indicate time of necropsy, text is the dose
    plotArrow(toxicity.spls,  group = liver.toxicity$treatment[, 'Time.Group'],
    ind.names  = liver.toxicity$treatment[, 'Dose.Group'],
    legend = TRUE)

    # colors indicate time of necropsy, text is the dose, label at start of arrow
    plotArrow(toxicity.spls,  group = liver.toxicity$treatment[, 'Time.Group'],
    ind.names  = liver.toxicity$treatment[, 'Dose.Group'],
    legend = TRUE, position.names = 'start')

    ## variable representation for objects of class 'sgcca' (or 'rgcca')
    # ----------------------------------------------------
    data(nutrimouse)
    Y = unmap(nutrimouse$diet)
    data = list(gene = nutrimouse$gene, lipid = nutrimouse$lipid, Y = Y)
    design1 = matrix(c(0,1,1,1,0,1,1,1,0), ncol = 3, nrow = 3, byrow = TRUE)
    nutrimouse.sgcca <- wrapper.sgcca(X = data,
    design = design1,
    penalty = c(0.3, 0.5, 1),
    ncomp = 3,
    scheme = "centroid")

    # default style: same color for all samples
    plotArrow(nutrimouse.sgcca)

    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot')

    # ind.names to visualise the unique individuals
    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot', ind.names = TRUE)

    # ind.names to visualise the unique individuals
    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot', ind.names = TRUE,position.names   = 'start')

    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot', ind.names = TRUE,position.names   = 'end')

    # ind.names indicates the diet
    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot', ind.names = nutrimouse$diet, position.names= 'start')

    # ind.names to visualise the unique individuals, start position
    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot', ind.names = TRUE, position.names   = 'start')

    # end position
    plotArrow(nutrimouse.sgcca, group = nutrimouse$diet, legend =TRUE,
    title = 'my plot', ind.names = TRUE, position.names   = 'end')

    ## variable representation for objects of class 'sgccda'
    # ----------------------------------------------------
    # Note: the code differs from above as we use a 'supervised' GCCA analysis
    data(nutrimouse)
    Y = nutrimouse$diet
    data = list(gene = nutrimouse$gene, lipid = nutrimouse$lipid)
    design1 = matrix(c(0,1,0,1), ncol = 2, nrow = 2, byrow = TRUE)

    nutrimouse.sgccda1 <- wrapper.sgccda(X = data,
    Y = Y,
    design = design1,
    ncomp = 2,
    keepX = list(gene = c(10,10), lipid = c(15,15)),
    scheme = "centroid")

    #  default colors correspond to outcome Y
    plotArrow(nutrimouse.sgccda1)

    # with legend and title and indiv ID
    plotArrow(nutrimouse.sgccda1,  legend = TRUE, title = 'my sample plot',
    ind.names = TRUE, position.names = 'start')

    ## End(Not run)

[Package mixOmics version 6.10.9 Index]