[Gnuplot-info] plotting bar graphs: missing one datapoint

[H.S. <hs....@gm...>]

I am trying to plot a bar graph as an example. Here is the data file I
am using:
#####################
#data
1       10
2       30
3       20
4       40
#####################

and here is the command I am trying to plot the data:
gnuplot> plot "hist.dat" usi 1:2:(0.7) w boxes fs solid 0.9

but the plot is missing the first data point (1,10). I am sure I am
doing something basically wrong ... what is it?

This is on Gnuplot Version 4.0 patchlevel 0
thanks,
->HS