table questions

Hi again!


Suppose I have the following:

xy <- round(rexp(20),1)
xy

[1] 0.1 3.4 1.6 0.4 1.0 1.4 0.2 0.3 1.6 0.2 0.0 0.1 0.1 1.0 2.0 0.9
2.5 0.1 1.5 0.4

table(xy)

xy
  0 0.1 0.2 0.3 0.4 0.9   1 1.4 1.5 1.6   2 2.5 3.4
  1   4   2   1   2   1   2   1   1   2   1   1   1

Is there a way to set things up to have
0 - 0.4   0.5 - 0.9  etc. please?

I know there is the cut functions, but breaks are required.  If you
don't have breaks, what should you do, please?

Would using the breaks from the hist function work appropriately, please?

thanks
Edna Bell