Two things: 1) I now see where width is defined in the hist() documentation... I was expecting it to be in the definition up at the top, but instead the definition has **kwords.. not very helpful.
2) I noticed in my original historgram, that the y scale was not the same as the x scale.. so I updated my code: import pylab pylab.grid() x_values=[1,1,2,2,2,3,3,3,4,4,4,5,5,6,6,6] pylab.hist(x_values,6) pylab.yticks(pylab.arange(3)) pylab.axis('scaled') pylab.show() It produced this image: http://enigmacurry.com/usenet/historgram-bars-not-in-grid-lines2.png It has the same problem.. -- http://mail.python.org/mailman/listinfo/python-list