Scaling symbols with factor values

Select Factor when you want to apply a scaling factor to control the size of the symbols. Factor calculates a radius proportional to the value in the scaling field. You can specify minimum and maximum to prevent the symbols becoming too small or too large.

When you use this method, the function reads the value in the scaling field for each point:

• If this is less than or equal to the figure specified Base value (a cutoff), the point is ignored.
• Otherwise, the difference between the value in the scaling field and the base value is multiplied by the specified Scaling factor to determine the radius of the symbol.
• If the radius is less than the specified Minimum radius , then the minimum radius is applied.
• If the radius is greater than the specified Maximum radius , then the maximum radius is applied.

When the Display Mode is set to Natural Log Transform, the log is calculated after the base value is subtracted from the value in the scaling field.