image.msimat: Plot mass spectrometry imaging image of a msimat object
In kbseah/mass2adduct: Mass Spectrometry Imaging Molecular Adduct Finder

From an MSI dataset imported with msimat, plot an image of the signal intensity for a specified peaks. The image dimensions must be specified as either nrow or |codencol.

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## S3 method for class 'msimat'
image(d, peak = NULL, nrow = NULL, ncol = NULL,
  col = grDevices::terrain.colors(36), main = NULL, ...)

`d`	msimat; MSI dataset imported with `msimat`
`peak`	Name of the peak to plot. If NULL, then plot the total intensity for all peaks
`nrow`	Number of rows in the MSI image matrix
`ncol`	Number of columns in the MSI image matrix
`col`	Color scale to use (passed to `image`)
`main`	Title of plot, otherwise the peak number
`...`	Other parameters to pass to `image`