1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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 Library General Public License for more details.
#
# You should have received A copy of the GNU Library General
# Public License along with this library; if not, write to the
# Free Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
################################################################################
# FUNCTION: DESCRIPTION:
# .asRGB Converts any R color to RGB (red/green/blue)
# .chcode Changes from one to another number system
# .hex.to.dec Converts heximal numbers do decimal numbers
# .dec.to.hex Converts decimal numbers do heximal numbers
################################################################################
.asRGB <-
function(col = rainbowPalette(64), alpha = FALSE)
{
# A function implemented by Diethelm Wuertz
# Description:
# Converts any R color to RGB (red/green/blue)
# Arguments:
# col - vector of any of the three kind of R colors, i.e., either a
# color name (an element of colors()), a hexadecimal string of
# the form "#rrggbb", or an integer i meaning palette()[i].
# alpha - a logical value indicating whether alpha channel values
# should be returned.
# FUNCTION:
# Color Conversion:
result <- col2rgb(col = col, alpha = alpha)
# Return Value:
t(result)
}
# ------------------------------------------------------------------------------
.chcode <-
function(b, base.in = 2, base.out = 10, digits = "0123456789ABCDEF")
{
# A function implemented by Diethelm Wuertz
# Description:
# Changes from one to another number system
# Arguments:
# b - number specified in the input base
# b.in - input base
# b.out - output base
# digits - digits string
# Value:
# returns the input in the form represented by the output base
# Author:
# Peter Wolf Universitaet Bielefeld
# from: http://tolstoy.newcastle.edu.au/R/help/05/04/2085.html
# FUNCTION:
# Change Number System:
digits = substring(digits,1:nchar(digits),1:nchar(digits))
if (length(base.in) == 1)
base.in = rep(base.in, max(nchar(b) - 1))
if (is.numeric(b))
b = as.character(as.integer(b))
b.num = lapply(strsplit(b, ""),
function(x) {match(x, digits)-1} )
result = lapply(b.num,
function(x) {cumprod(rev(c(base.in,1))[1:length(x)]) %*% rev(x)} )
number = unlist(result)
# DW Print Output Suppressed
# cat("decimal representation:",number,"\n")
if (length(base.out) == 1) {
base.out<-rep(base.out, 1+ceiling(log(max(number), base = base.out)))
}
n.base = length(base.out)
result = NULL
for(i in n.base:1){
result = rbind(number %% base.out[i], result)
number = floor(number/base.out[i])
}
result[]<-digits[result+1]
ans = apply(result, 2, paste, collapse = "")
# Return Value:
ans
}
# ------------------------------------------------------------------------------
.hex.to.dec <-
function(b)
{
# A function implemented by Diethelm Wuertz
# Description:
# Converts heximal numbers do decimal numbers
# Arguments:
# b - a heximal number
# Value:
# returns a heximal numbers as decimal numbers
# FUNCTION:
# Hex to Bin:
ans = as.numeric(.chcode(b, base.in = 16, base.out = 10))
# Return Value:
ans
}
# ------------------------------------------------------------------------------
.dec.to.hex <-
function(b)
{
# A function implemented by Diethelm Wuertz
# Description:
# Converts decimal numbers do heximal numbers
# Arguments:
# x - a decimal number
# Value:
# returns a decimal numbers as heximal numbers
# FUNCTION:
# Decimal to Hex:
ans = .chcode(b, base.in = 10, base.out = 16)
# Return Value:
ans
}
################################################################################
|
