# set the labels or create an empty hash
@graph.labels = options[:interval_labels] \
- if options.has_key?(:labels) and options[:labels].class = Hash
+ if options.has_key?(:interval_labels) and \
+ options[:interval_labels].class = Hash
@graph.x_axis_label = options[:x_axis_label] \
if options.has_key?(:x_axis_label)
@graph.y_axis_label = options[:y_axis_label] \