Sets the alpha level (transparancy) of the plot's foreground
returns the modified chart object.
References:
http://www.jfree.org/jfreechart/api/javadoc/
http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/JFreeChart.html
(defn set-alpha
" Sets the alpha level (transparancy) of the plot's foreground
returns the modified chart object.
References:
http://www.jfree.org/jfreechart/api/javadoc/
http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/JFreeChart.html
"
([chart alpha]
(.setForegroundAlpha (.getPlot chart) alpha)
chart))
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