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
|
test_that("uses scale limits, not data limits", {
dat <- data_frame(x = c(0.1, 1:100))
dat$y <- dexp(dat$x)
base <- ggplot(dat, aes(x, y)) +
stat_function(fun = dexp)
full <- base +
scale_x_continuous(limits = c(0.1, 100)) +
scale_y_continuous()
ret <- layer_data(full)
full_log <- base +
scale_x_log10(limits = c(0.1, 100)) +
scale_y_continuous()
ret_log <- layer_data(full_log)
expect_equal(ret$y[c(1, 101)], ret_log$y[c(1, 101)])
expect_equal(range(ret$x), c(0.1, 100))
expect_equal(range(ret_log$x), c(-1, 2))
expect_false(any(is.na(ret$y)))
expect_false(any(is.na(ret_log$y)))
})
test_that("works in plots without any data", {
f <- function(x) 2*x
# default limits, 0 to 1
base <- ggplot() + geom_function(fun = f, n = 6)
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 1, length.out = 6))
expect_identical(ret$y, 2*ret$x)
# manually set limits with xlim()
base <- ggplot() + xlim(0, 2) + geom_function(fun = f, n = 6)
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 2, length.out = 6))
expect_identical(ret$y, 2*ret$x)
# manually set limits with xlim argument
base <- ggplot() + geom_function(fun = f, n = 6, xlim = c(0, 2))
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 2, length.out = 6))
expect_identical(ret$y, 2*ret$x)
# mapping of color via aes() works
base <- ggplot() +
geom_function(aes(color = "fun"), fun = f, n = 6) +
scale_color_manual(values = c(fun = "#D55E00"))
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 1, length.out = 6))
expect_identical(ret$y, 2*ret$x)
expect_identical(ret$colour, rep("#D55E00", 6))
})
test_that("works with discrete x", {
dat <- data_frame(x = c("a", "b"))
base <- ggplot(dat, aes(x, group = 1)) +
stat_function(fun = as.numeric, geom = "point", n = 2)
ret <- layer_data(base)
expect_equal(ret$x, mapped_discrete(1:2))
expect_equal(ret$y, 1:2)
})
test_that("works with transformed scales", {
dat <- data_frame(x = 1:10, y = (1:10)^2)
# first without explicit mapping of y
base <- ggplot(dat, aes(x, group = 1)) +
stat_function(fun = ~ .x^2, n = 5)
ret <- layer_data(base)
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(1, 10, length.out = 5))
expect_equal(ret$y, ret$x^2)
ret <- layer_data(base + scale_x_log10())
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(0, 1, length.out = 5))
expect_equal(ret$y, (10^ret$x)^2)
ret <- layer_data(base + scale_y_log10())
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(1, 10, length.out = 5))
expect_equal(10^ret$y, ret$x^2)
ret <- layer_data(base + scale_x_log10() + scale_y_log10())
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(0, 1, length.out = 5))
expect_equal(10^ret$y, (10^ret$x)^2)
# now with explicit mapping of y
base <- ggplot(dat, aes(x, y)) + geom_point() +
stat_function(fun = ~ .x^2, n = 5)
ret <- layer_data(base, 2)
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(1, 10, length.out = 5))
expect_equal(ret$y, ret$x^2)
ret <- layer_data(base + scale_x_log10(), 2)
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(0, 1, length.out = 5))
expect_equal(ret$y, (10^ret$x)^2)
ret <- layer_data(base + scale_y_log10(), 2)
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(1, 10, length.out = 5))
expect_equal(10^ret$y, ret$x^2)
ret <- layer_data(base + scale_x_log10() + scale_y_log10(), 2)
expect_equal(nrow(ret), 5)
expect_equal(ret$x, seq(0, 1, length.out = 5))
expect_equal(10^ret$y, (10^ret$x)^2)
})
test_that("works with formula syntax", {
dat <- data_frame(x = 1:10)
base <- ggplot(dat, aes(x, group = 1)) +
stat_function(fun = ~ .x^2, geom = "point", n = 5) +
scale_x_continuous(limits = c(0, 10))
ret <- layer_data(base)
s <- seq(0, 10, length.out = 5)
expect_equal(ret$x, s)
expect_equal(ret$y, s^2)
})
test_that("Warn when drawing multiple copies of the same function", {
df <- data_frame(x = 1:3, y = letters[1:3])
p <- ggplot(df, aes(x, color = y)) + stat_function(fun = identity)
f <- function() {pdf(NULL); print(p); dev.off()}
expect_warning(f(), "Multiple drawing groups")
})
test_that("Line style can be changed via provided data", {
df <- data_frame(fun = "#D55E00")
base <- ggplot(df) +
geom_function(aes(color = fun), fun = identity, n = 6) +
scale_color_identity()
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 1, length.out = 6))
expect_identical(ret$y, ret$x)
expect_identical(ret$colour, rep("#D55E00", 6))
base <- ggplot() +
geom_function(
data = df, aes(color = fun), fun = identity, n = 6
) +
scale_color_identity()
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 1, length.out = 6))
expect_identical(ret$y, ret$x)
expect_identical(ret$colour, rep("#D55E00", 6))
base <- ggplot() +
stat_function(
data = df, aes(color = fun), fun = identity, n = 6
) +
scale_color_identity()
ret <- layer_data(base)
expect_identical(ret$x, seq(0, 1, length.out = 6))
expect_identical(ret$y, ret$x)
expect_identical(ret$colour, rep("#D55E00", 6))
})
|
