A period on the periodic table is a horizontal row. The atoms in this row show a trend in their width, and in the amount of work needed to make them an ion, among the fe â¦ w other similarities.
A coordinate grid has two perpendicular lines, or axes, labeled like number lines. The horizontal axis is called the x-axis. The vertical axis is called the y-axis. The point where the x-axis and y-axis intersect is called the origin. The numbers on a coordinate grid are used to locate points. Each point can be identified by an ordered pair of numbers; that is, a number on the x-axis called an x-coordinate, and a number on the y-axis called a y-coordinate. Ordered pairs are written in parentheses (x-coordinate, y-coordinate).
@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. By the sounds of it, you want a barplot() â Gavin Simpson Sep 15 '11 at 8:09. The information about plot(), write(), and read.csv() were very useful to me.