Displays data as a pie chart.
An array of data values to be displayed as a pie chart. xcenter, ycenter
Specifies the x and y coordinates of the center of the pie chart, by default in normal coordinates. radius
Specifies the size of the radius of the pie, by default in normal coordinates.
If nonzero, the pie chart is drawn in device coordinates. (Default: normal coordinates) Label
A string array specifying the labels for each slice. The array must contain the same number of elements as data. If a slice is too small to display text, the label is not drawn. (Default: no labels) Font
An integer specifying a PV-WAVE font command. For example, 3 is the command for the font Complex Roman. Do not put an exclamation mark (!) in front of the font command. For a complete list of font commands, see Chapter 10: Using Fonts in the PV-WAVE User's Guide. (Default: current font) Charsize
Sets the overall character size for annotation. A Charsize of 1.0 is the normal; a size of 2.0 is twice as big, and so on. (Default: !P.Charsize) Tposition
An integer or integer array specifying where to draw labels for the individual slices.
| 0 | Draw the label inside the slice. |
| 1 | Draw the label outside the slice. Draw the label text horizontally. |
| 2 | Draw the label outside the slice. Align the angle of the label text with the slice. |
Tcolor
An integer or integer array specifying colors for the slices. If set to a scalar, all slices are drawn with the specified color. If set to an array, the colors for each slice are mapped, sequentially, to the value of each array index. Tperct
If nonzero, the percentage for each slice is displayed. (Default: the percentage is not displayed)Tvalue
If nonzero, the value of each slice is displayed. (Default: the values are not displayed)Tborder
If nonzero, a border is drawn around each label. (Default: no border)Tbord_color
An integer specifying the color index for the label border. (Default: !P.Color) Shade
A floating point value specifying the percent of displacement for a shadow under the pie chart. By default, the shadow is offset in the direction of 315 degrees. (Default: zero displacement)Explode
A floating point scalar or array specifying how far from the center to offset or "explode" the pie slices. This value is specified as a percentage of the pie radius. If a scalar, all slices are offset by the same amount. If set to an array, the offset for each slice is mapped, sequentially, to the value of each array index. (Default: no offset)Other PIE_CHART keywords are listed below. For a description of each keyword, see Chapter 3, Graphics and Plotting Keywords, in the PV-WAVE Reference.
| Channel | Fill_Pattern | Normal | Spacing |
| Clip | Linestyle | Pattern | Symsize |
| Color | Line_Fill | PClip | T3d |
| Data | Noclip | Psym | Thick |
| Device | Orientation |
This procedure creates a pie chart at a specified position within the graphics window. You can add text labels and colors to individual slices of the pie. In addition, pie slices can be offset or "exploded" from the center, and slices can be given shadows for a three-dimensional look.
You can display up to 30 slices; however fewer than 15 is recommended for the best display. Labels are not displayed in any slices that are too small. If data for a particular slice represents less than 0.01% of the overall dataset, the slice is not drawn and an informational message appears.
data = fltarr(4)
data(0) = 32
data(1) = 22
data(2) = 11
data(3) = 35
strg = strarr(4)
; Create labels
; ---------------
strg(0)='Renault'
strg(1)='Peugeot'
strg(2)='Citroen'
strg(3)='Others'
title = '!18French automobile market shares'
; Create the window
; -----------------
WINDOW, /Free, Xsize=800, Ysize=800
; Initialize a white background
; -----------------------------
loadct,13
!p.color=0
!P.Background=!d.n_colors-1
ERASE,!P.Background
; Plot the chart
; --------------
PIE_CHART, data, .5, .5, .25, /Tperc, Explode=[.05,0,0,.1], $
Shade=0.04, Tpos=[1,1,1,1], /Tborder, Color=[60,120,140,200],$
Label=strg, Font='3', Charsize=1.5
XYOUTS, .5,.9, Title, Charsize=3, Charthick=2, Align=.5, $
/Normal, Color=0
Figure 2-66 An exploded pie chart with labels and a title.See Also
