How to change width of bar when there are very few bars?

If i assign a vector with same small width for each bar (here) still both are
same broad. I think it takes ratio for whole area.  Is there any other
parameter to control it.? Any working example will help me.

Hi Manish,
If you are using the "barplot" function, you probably want to specify 
both "width" and "space". If you just want to specify a single number, 
look at the "barp" function in the plotrix package, where "width" is the 
parameter that controls the width of the bar as a proportion of the 
distance between bar centers. Note that you won't get different bar 
widths with barp.

Jim