what does the x axis on a histograms represent
@Huck Smith ...err then that is not a histogram. A histogram is a crude estimate of the probability density function of a univariate (in the conventional sense of a histogram) variable. Hence, in a histogram the x-axis represents the single variable and the y-axis is the estimate of the density of the data at values on the scale of x. The information about plot(), write(), and read.csv() were very useful to me. The terminology related to plot and histogram is something I can use.