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plot/plotter/boxplot_test.go at master · ffhelicopter/plot · GitHub
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boxplot_test.go
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boxplot_test.go
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// Copyright ©2015 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package
plotter_test
import
(
"fmt"
"log"
"testing"
"golang.org/x/exp/rand"
"gonum.org/v1/plot"
"gonum.org/v1/plot/cmpimg"
"gonum.org/v1/plot/plotter"
"gonum.org/v1/plot/vg"
)
func
ExampleBoxPlot
() {
rnd
:=
rand
.
New
(
rand
.
NewSource
(
1
))
// Create the sample data.
const
n
=
100
uniform
:=
make
(plotter.
ValueLabels
,
n
)
normal
:=
make
(plotter.
ValueLabels
,
n
)
expon
:=
make
(plotter.
ValueLabels
,
n
)
for
i
:=
0
;
i
<
n
;
i
++
{
uniform
[
i
].
Value
=
rnd
.
Float64
()
uniform
[
i
].
Label
=
fmt
.
Sprintf
(
"%4.4f"
,
uniform
[
i
].
Value
)
normal
[
i
].
Value
=
rnd
.
NormFloat64
()
normal
[
i
].
Label
=
fmt
.
Sprintf
(
"%4.4f"
,
normal
[
i
].
Value
)
expon
[
i
].
Value
=
rnd
.
ExpFloat64
()
expon
[
i
].
Label
=
fmt
.
Sprintf
(
"%4.4f"
,
expon
[
i
].
Value
)
}
// Make boxes for our data and add them to the plot.
uniBox
,
err
:=
plotter
.
NewBoxPlot
(
vg
.
Points
(
20
),
0
,
uniform
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
normBox
,
err
:=
plotter
.
NewBoxPlot
(
vg
.
Points
(
20
),
1
,
normal
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
expBox
,
err
:=
plotter
.
NewBoxPlot
(
vg
.
Points
(
20
),
2
,
expon
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
// Make a vertical box plot.
uniLabels
,
err
:=
uniBox
.
OutsideLabels
(
uniform
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
normLabels
,
err
:=
normBox
.
OutsideLabels
(
normal
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
expLabels
,
err
:=
expBox
.
OutsideLabels
(
expon
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
p1
,
err
:=
plot
.
New
()
if
err
!=
nil
{
log
.
Panic
(
err
)
}
p1
.
Title
.
Text
=
"Vertical Box Plot"
p1
.
Y
.
Label
.
Text
=
"plotter.Values"
p1
.
Y
.
Max
=
6
p1
.
Add
(
uniBox
,
uniLabels
,
normBox
,
normLabels
,
expBox
,
expLabels
)
// Set the X axis of the plot to nominal with
// the given names for x=0, x=1 and x=2.
p1
.
NominalX
(
"Uniform
\n
Distribution"
,
"Normal
\n
Distribution"
,
"Exponential
\n
Distribution"
)
err
=
p1
.
Save
(
200
,
200
,
"testdata/verticalBoxPlot.png"
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
// Now, make the same plot but horizontal.
normBox
.
Horizontal
=
true
expBox
.
Horizontal
=
true
uniBox
.
Horizontal
=
true
// We can use the same plotters but the labels need to be recreated.
uniLabels
,
err
=
uniBox
.
OutsideLabels
(
uniform
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
normLabels
,
err
=
normBox
.
OutsideLabels
(
normal
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
expLabels
,
err
=
expBox
.
OutsideLabels
(
expon
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
p2
,
err
:=
plot
.
New
()
if
err
!=
nil
{
log
.
Panic
(
err
)
}
p2
.
Title
.
Text
=
"Horizontal Box Plot"
p2
.
X
.
Label
.
Text
=
"plotter.Values"
p2
.
Add
(
uniBox
,
uniLabels
,
normBox
,
normLabels
,
expBox
,
expLabels
)
// Set the Y axis of the plot to nominal with
// the given names for y=0, y=1 and y=2.
p2
.
NominalY
(
"Uniform
\n
Distribution"
,
"Normal
\n
Distribution"
,
"Exponential
\n
Distribution"
)
err
=
p2
.
Save
(
200
,
200
,
"testdata/horizontalBoxPlot.png"
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
// Now, make a grouped box plot.
p3
,
err
:=
plot
.
New
()
if
err
!=
nil
{
log
.
Panic
(
err
)
}
p3
.
Title
.
Text
=
"Box Plot"
p3
.
Y
.
Label
.
Text
=
"plotter.Values"
w
:=
vg
.
Points
(
20
)
for
x
:=
0.0
;
x
<
3.0
;
x
++
{
b0
,
err
:=
plotter
.
NewBoxPlot
(
w
,
x
,
uniform
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
b0
.
Offset
=
-
w
-
vg
.
Points
(
3
)
b1
,
err
:=
plotter
.
NewBoxPlot
(
w
,
x
,
normal
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
b2
,
err
:=
plotter
.
NewBoxPlot
(
w
,
x
,
expon
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
b2
.
Offset
=
w
+
vg
.
Points
(
3
)
p3
.
Add
(
b0
,
b1
,
b2
)
}
// Add a GlyphBox plotter for debugging.
p3
.
Add
(
plotter
.
NewGlyphBoxes
())
// Set the X axis of the plot to nominal with
// the given names for x=0, x=1 and x=2.
p3
.
NominalX
(
"Group 0"
,
"Group 1"
,
"Group 2"
)
err
=
p3
.
Save
(
300
,
300
,
"testdata/groupedBoxPlot.png"
)
if
err
!=
nil
{
log
.
Panic
(
err
)
}
}
func
TestBoxPlot
(
t
*
testing.
T
) {
cmpimg
.
CheckPlot
(
ExampleBoxPlot
,
t
,
"verticalBoxPlot.png"
,
"horizontalBoxPlot.png"
,
"groupedBoxPlot.png"
)
}
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