The getColourScale function can be used to obtain a standard or
customised colour scale for use in the package's image visualisation
functions.
getColourScale(n)A list with elements
A character-mode vector representing the colours in the scale, usually of length 100. This can be passed as a colour scale to R's plotting functions.
A single character string representing the background colour.
A number, colour name or list (see Details).
Jon Clayden
Colour scales can be specified in any of three ways. Firstly, by a single
number, representing a predefined colour scale. Currently valid values are 1
(greyscale, black background), 2 (red to yellow heat scale, red background),
3 (blue to red rainbow scale, blue background), 4 (blue to white to red
diverging scale, white background), 5 (white to red, white background), 6
(white to blue, white background), 7 (yellow to orange to red) and 8 (purple
to green to yellow, perceptually uniform). Secondly, a single colour name
can be given (see colours); in this case the background will
be black. This is useful for binary images. Thirdly, and most flexibly, a
list with two named elements can be given: colours, a vector of
colours representing the colour scale, perhaps created using using the
shades package; and background, a single colour representing
the background.
Please cite the following reference when using TractoR in your work:
J.D. Clayden, S. Muñoz Maniega, A.J. Storkey, M.D. King, M.E. Bastin & C.A. Clark (2011). TractoR: Magnetic resonance imaging and tractography with R. Journal of Statistical Software 44(8):1-18. https://www.jstatsoft.org/v44/i08/.