Site icon R-bloggers

R Gauge Plots

[This article was first published on SoMe Lab » r-project, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

Gaston Sanchez’s post on R-Bloggers inspired me to waste a bit of time. He wanted to replicate the Google Charts widget to make gauges. I modified his code (below) in some minor ways and made a function out of it so you can alter the look and feel of your gauge. Feel free to pilfer and modify the R code…

 

?Download download.R
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
165
166
167
168
169
170
171
172
173
174
175
176
#
# Original code by Gaston Sanchez
#  https://www.r-bloggers.com/gauge-chart-in-r/
# Modified by Jeff Hemsley
#  Somelab.net
#  Twitter: @JeffHemsley
#
 
dial.plot <- function(label = "UseR!", value = 78, dial.radius = 1
          , value.cex = 3, value.color = "black"
          , label.cex = 3, label.color = "black"
          , gage.bg.color = "white"
          , yellowFrom = 75, yellowTo = 90, yellow.slice.color = "#FF9900"
          , redFrom = 90, redTo = 100, red.slice.color = "#DC3912"
          , needle.color = "red", needle.center.color = "black", needle.center.cex = 1
          , dial.digets.color = "grey50"
          , heavy.border.color = "gray85", thin.border.color = "gray20", minor.ticks.color = "gray55", major.ticks.color = "gray45") {
 
  whiteFrom = min(yellowFrom, redFrom) - 2
  whiteTo = max(yellowTo, redTo) + 2
 
  # function to create a circle
  circle <- function(center=c(0,0), radius=1, npoints=100)
  {
    r = radius
    tt = seq(0, 2*pi, length=npoints)
    xx = center[1] + r * cos(tt)
    yy = center[1] + r * sin(tt)
    return(data.frame(x = xx, y = yy))
  }
 
  # function to get slices
  slice2xy <- function(t, rad)
  {
    t2p = -1 * t * pi + 10*pi/8
    list(x = rad * cos(t2p), y = rad * sin(t2p))
  }
 
  # function to get major and minor tick marks
  ticks <- function(center=c(0,0), from=0, to=2*pi, radius=0.9, npoints=5)
  {
    r = radius
    tt = seq(from, to, length=npoints)
    xx = center[1] + r * cos(tt)
    yy = center[1] + r * sin(tt)
    return(data.frame(x = xx, y = yy))
  }
 
  # external circle (this will be used for the black border)
  border_cir = circle(c(0,0), radius=dial.radius, npoints = 100)
 
  # open plot
  plot(border_cir$x, border_cir$y, type="n", asp=1, axes=FALSE,
       xlim=c(-1.05,1.05), ylim=c(-1.05,1.05),
       xlab="", ylab="")
 
  # gray border circle
  external_cir = circle(c(0,0), radius=( dial.radius * 0.97 ), npoints = 100)
    # initial gage background
  polygon(external_cir$x, external_cir$y,
          border = gage.bg.color, col = gage.bg.color, lty = NULL)
 
  # add gray border
  lines(external_cir$x, external_cir$y, col=heavy.border.color, lwd=18)
  # add external border
  lines(border_cir$x, border_cir$y, col=thin.border.color, lwd=2)
 
  # yellow slice (this will be used for the yellow band)
  yel_ini = (yellowFrom/100) * (12/8)
  yel_fin = (yellowTo/100) * (12/8)
  Syel = slice2xy(seq.int(yel_ini, yel_fin, length.out = 30), rad= (dial.radius * 0.9) )
  polygon(c(Syel$x, 0), c(Syel$y, 0),
          border = yellow.slice.color, col = yellow.slice.color, lty = NULL)
 
  # red slice (this will be used for the red band)
  red_ini = (redFrom/100) * (12/8)
  red_fin = (redTo/100) * (12/8)
  Sred = slice2xy(seq.int(red_ini, red_fin, length.out = 30), rad= (dial.radius * 0.9) )
  polygon(c(Sred$x, 0), c(Sred$y, 0),
          border = red.slice.color, col = red.slice.color, lty = NULL)
 
  # white slice (this will be used to get the yellow and red bands)
  white_ini = (whiteFrom/100) * (12/8)
  white_fin = (whiteTo/100) * (12/8)
  Swhi = slice2xy(seq.int(white_ini, white_fin, length.out = 30), rad= (dial.radius * 0.8) )
  polygon(c(Swhi$x, 0), c(Swhi$y, 0),
          border = gage.bg.color, col = gage.bg.color, lty = NULL)
 
 
 
  # calc and plot minor ticks
  minor.tix.out <- ticks(c(0,0), from=5*pi/4, to=-pi/4, radius=( dial.radius * 0.89 ), 21)
  minor.tix.in <- ticks(c(0,0), from=5*pi/4, to=-pi/4, radius=( dial.radius * 0.85 ), 21)
  arrows(x0=minor.tix.out$x, y0=minor.tix.out$y, x1=minor.tix.in$x, y1=minor.tix.in$y,
         length=0, lwd=2.5, col=minor.ticks.color)
 
  # coordinates of major ticks (will be plotted as arrows)
  major_ticks_out = ticks(c(0,0), from=5*pi/4, to=-pi/4, radius=( dial.radius * 0.9 ), 5)
  major_ticks_in = ticks(c(0,0), from=5*pi/4, to=-pi/4, radius=( dial.radius * 0.77 ), 5)
  arrows(x0=major_ticks_out$x, y0=major_ticks_out$y, col=major.ticks.color,
         x1=major_ticks_in$x, y1=major_ticks_in$y, length=0, lwd=3)
 
  # calc and plot numbers at major ticks
  dial.numbers <- ticks(c(0,0), from=5*pi/4, to=-pi/4, radius=( dial.radius * 0.70 ), 5)
  dial.lables <- c("0", "25", "50", "75", "100")
  text(dial.numbers$x, dial.numbers$y, labels=dial.lables, col=dial.digets.color, cex=.8)
 
 
  # Add dial lables
  text(0, (dial.radius * -0.65), value, cex=value.cex, col=value.color)
  # add label of variable
  text(0, (dial.radius * 0.43), label, cex=label.cex, col=label.color)
 
  # add needle
  # angle of needle pointing to the specified value
  val = (value/100) * (12/8)
  v = -1 * val * pi + 10*pi/8 # 10/8 becuase we are drawing on only %80 of the cir
  # x-y coordinates of needle
  needle.length <- dial.radius * .67
  needle.end.x = needle.length * cos(v)
  needle.end.y = needle.length * sin(v)
 
  needle.short.length <- dial.radius * .1
  needle.short.end.x = needle.short.length * -cos(v)
  needle.short.end.y = needle.short.length * -sin(v)
 
  needle.side.length <- dial.radius * .05
  needle.side1.end.x = needle.side.length * cos(v - pi/2) 
  needle.side1.end.y = needle.side.length * sin(v - pi/2)
  needle.side2.end.x = needle.side.length * cos(v + pi/2) 
  needle.side2.end.y = needle.side.length * sin(v + pi/2)
 
  needle.x.points <- c(needle.end.x, needle.side1.end.x, needle.short.end.x, needle.side2.end.x)
  needle.y.points <- c(needle.end.y, needle.side1.end.y, needle.short.end.y, needle.side2.end.y)
  polygon(needle.x.points, needle.y.points, col=needle.color)
 
  # add central blue point
  points(0, 0, col=needle.center.color, pch=20, cex=needle.center.cex)
  # add values 0 and 100
}
 
 
par(mar=c(0.2,0.2,0.2,0.2), bg="black", mfrow=c(2,2))
 
dial.plot ()
dial.plot (label = "Working", value = 25, dial.radius = 1
      , value.cex = 3.3, value.color = "white"
      , label.cex = 2.7, label.color = "white"
      , gage.bg.color = "black"
      , yellowFrom = 73, yellowTo = 95, yellow.slice.color = "gold"
      , redFrom = 95, redTo = 100, red.slice.color = "red"
      , needle.color = "red", needle.center.color = "white", needle.center.cex = 1
      , dial.digets.color = "white"
      , heavy.border.color = "white", thin.border.color = "black", minor.ticks.color = "white", major.ticks.color = "white")
 
 
dial.plot (label = "caffeine", value = 63, dial.radius = .7
           , value.cex = 2.3, value.color = "white"
           , label.cex = 1.7, label.color = "white"
           , gage.bg.color = "black"
           , yellowFrom = 80, yellowTo = 93, yellow.slice.color = "gold"
           , redFrom = 93, redTo = 100, red.slice.color = "red"
           , needle.color = "red", needle.center.color = "white", needle.center.cex = 1
           , dial.digets.color = "white"
           , heavy.border.color = "black", thin.border.color = "lightsteelblue4", minor.ticks.color = "orange", major.ticks.color = "tan")
 
 
dial.plot (label = "Fun", value = 83, dial.radius = .7
           , value.cex = 2.3, value.color = "white"
           , label.cex = 1.7, label.color = "white"
           , gage.bg.color = "black"
           , yellowFrom = 20, yellowTo = 75, yellow.slice.color = "olivedrab"
           , redFrom = 75, redTo = 100, red.slice.color = "green"
           , needle.color = "red", needle.center.color = "white", needle.center.cex = 1
           , dial.digets.color = "white"
           , heavy.border.color = "black", thin.border.color = "lightsteelblue4", minor.ticks.color = "orange", major.ticks.color = "tan")
Ray-Ban Aviator
Cumpara Ochelari de Soare RayBan Aviator Ieftini si originali

To leave a comment for the author, please follow the link and comment on their blog: SoMe Lab » r-project.

R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.