This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.

# PolarGridLines

 PolarGridLines is an option for sector charts and polar plots that specifies polar grid lines.
• Polar grid lines can be both radial and angular.
 None no grid lines drawn Automatic grid lines placed automatically {radial,angular} grid lines specified separately in each direction
• With the Automatic setting, grid lines are usually placed at points whose coordinates have the minimum number of digits in their decimal representation.
• For each direction, the following grid line options can be given:
 None no grid lines drawn Automatic grid line positions chosen automatically {t1,t2,...} grid lines drawn at the specified positions {{t1,style1},...} grid lines with specified styles func a function to be applied to , to get the grid line option
• The positions of radial grid lines are specified by angles in radians, measured counterclockwise from the positive axis.
• Grid line styles can involve any graphics directives, such as RGBColor and Thickness.
• The grid line function may return any other grid line option.
Use automatically chosen polar grid lines:
Draw grid lines at the specified positions:
Specify polar grid styles:
Specify overall grid line style, using GridLinesStyle:
Use automatically chosen polar grid lines:
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Draw grid lines at the specified positions:
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Specify polar grid styles:
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Specify overall grid line style, using GridLinesStyle:
 Out[1]=
 Scope   (7)
Place the polar grids automatically:
Place grid lines in angular direction:
Place grid lines in radial direction:
For sector charts draw grid lines tangent to sector angles:
For sector charts draw grid lines tangent to sector radius:
For sector charts draw grid lines tangent to sector boundaries:
Specify the style of each grid line:
Specify overall grid line style, using GridLinesStyle:
Individually styled polar grid lines can be used with GridLinesStyle, and have higher priority:
Specify a grid function applied to and values in each direction:
New in 7