update readme

added info why the theme_dc.plot.L.45.nolegend.R exists

README.md

@@ -41,3 +41,6 @@ customtheme <- DC_theme_generator(type = 'L',
 ggplot(data = dat, aes(x=X, y=Y, color=Class)) + geom_point() + scale_color_manual(values=c("red","blue")) + xlab("X-axis") + ylab("Y-axis") + ggtitle("Customized DC_theme_generator") + customtheme
 ```
 
+The above theme results in a canvas like this:
+
+![Rplot](img/Rplot.png)
\ No newline at end of file

theme_dc.plot.L.45.nolegend.R

+# This is legacy theme defination for maintaining compatibility  with my own historical code base.
+
 library(ggplot2)
-theme_dc.plot.L.45.nolegend=theme(
+theme_dc.plot.L.45.nolegend=ggplot2::theme(
   axis.line = element_line(colour = "black",
                            size=0.5),
   panel.border = element_blank(),