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#############################################################################################################
# Authors:
# Ignacio Gonzalez, Genopole Toulouse Midi-Pyrenees, France
#
# created: 2015
# last modified:
#
# Copyright (C) 2015
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#############################################################################################################
#-- jet colors --#
#----------------#
color.jet =
function (n, alpha = 1)
{
#-- checking general input parameters --------------------------------------#
#---------------------------------------------------------------------------#
#-- n
if (length(n) > 1 || !is.finite(n))
stop("'n' must be an integer positive value.", call. = FALSE)
if (n < 1)
stop("'n' must be an integer positive value.", call. = FALSE)
#-- alpha
if (length(alpha) > 1 || !is.finite(alpha))
stop("'alpha' must be an numeric value in the range [0, 1].", call. = FALSE)
if (alpha < 0 || alpha > 1)
stop("'alpha' must be an numeric value in the range [0, 1].", call. = FALSE)
alpha = round(255 * alpha)
#-- end checking --#
#------------------#
ramp = colorRamp(c("#00008F", "#00009F", "#0000AF", "#0000BF", "#0000CF",
"#0000DF", "#0000EF", "#0000FF", "#0010FF", "#0020FF",
"#0030FF", "#0040FF", "#0050FF", "#0060FF", "#0070FF",
"#0080FF", "#008FFF", "#009FFF", "#00AFFF", "#00BFFF",
"#00CFFF", "#00DFFF", "#00EFFF", "#00FFFF", "#10FFEF",
"#20FFDF", "#30FFCF", "#40FFBF", "#50FFAF", "#60FF9F",
"#70FF8F", "#80FF80", "#8FFF70", "#9FFF60", "#AFFF50",
"#BFFF40", "#CFFF30", "#DFFF20", "#EFFF10", "#FFFF00",
"#FFEF00", "#FFDF00", "#FFCF00", "#FFBF00", "#FFAF00",
"#FF9F00", "#FF8F00", "#FF8000", "#FF7000", "#FF6000",
"#FF5000", "#FF4000", "#FF3000", "#FF2000", "#FF1000",
"#FF0000", "#EF0000", "#DF0000", "#CF0000", "#BF0000",
"#AF0000", "#9F0000", "#8F0000", "#800000"),
space = "Lab")
rgb(ramp(seq(0, 1, length = n)), alpha = alpha, maxColorValue = 255)
}
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