How do you draw a bar graph from a table of X,Y values?

In a previous post you saw how to create a data frame in R using a set off x and y values as shown:

  x      ItmVal
1 A     69
2 B     47
3 C     11
4 D     12
5 E     42
6 F     24

Here 1 to six are line numbers.

It is easy to draw a bar graph using this data:
------
>  dap <- br="" data.frame="">+  x=factor(c("A","B","C","D","E","F"), levels=c("A","B","C","D","E","F")),
+ ItmVal=c(69,47,11,12,42,24)
+ )
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You map the data to aesthetics as shown and you can display your graph as shown.

ggplot-bargraph1

On the other hand if you want a different color for each of the different x values you could use this:

ggplot_bargraph2