

_B_a_r _P_l_o_t_s

     barplot(height, width = 1, space = NULL, names.arg = NULL,
             legend.text = NULL, beside = FALSE, horiz = FALSE,
             col = heat.colors(NR), border = par("fg"), main = NULL,
             xlab = NULL, ylab = NULL, xlim = NULL, ylim = NULL,
             axes = TRUE, ...)

_A_r_g_u_m_e_n_t_s:

  height: either a vector or matrix of values describing the
          bars which make up the plot.  If `height' is a
          vector, the plot consists of a sequence of rec-
          tangular bars with heights given by the values in
          the vector.  If `height' is a matrix and `beside'
          is `FALSE' then each bar of the plot corresponds
          to a column of `height', with the values in the
          column giving the heights of stacked ``sub-bars''
          making up the bar. If `height' is a matrix and
          `beside' is `TRUE', then the values in each column
          are juxtaposed rather than stacked.

   width: optional vector of bar widths.

   space: the amount of space (as a fraction of the average
          bar width) left before each bar.  May be given as
          a single number or one number per bar.  If
          `height' is a matrix and `beside' is `TRUE',
          `space' may be specified by two numbers, where the
          first is the space between bars in the same group,
          and the second the space between the groups.  If
          not given explicitly, it defaults to `c(0,1)' if
          `height' is a matrix and `beside' is `TRUE', and
          to 0.2 otherwise.

names.arg: a vector of names to be plotted below each bar or
          group of bars.  If this argument is omitted, then
          the names are taken from the `names' attribute of
          `height' if this is a vector, or the column names
          of `height' if this is a matrix.

legend.text: a vector of text used to construct a legend for
          the plot.  This is only useful when `height' is a
          matrix.  In that case the legend labels should
          correspond to the rows of `height'.

  beside: a logical value.  If `FALSE', the columns of
          `height' are portrayed as stacked bars, and if
          `TRUE' the columns are portrayed as juxtaposed
          bars.

   horiz: a logical value.  If `FALSE', the bars are drawn
          vertically with the first bar to the left.  If
          `TRUE', the bars are drwan horizontally with the
          first at the bottom.

     col: a vector of colors for the bars or bar components.

  border: the color to be used for the border of the bars.

    main: an overall title for the plot.

    xlab: a label for the x axis.

    ylab: a label for the y axis.

    xlim: limits for the x axis.

    ylim: limits for the y axis.

    axes: logical.  If `TRUE', a vertical axis is drawn.

     ...: further arguments are passed to `title(.)'.

_V_a_l_u_e:

     A numeric vector, giving the coordinates of the bar
     midpoints drawn, useful for adding to the graph.

_S_e_e _A_l_s_o:

     `plot(...,type="h")', `dotplot', `hist'.

_E_x_a_m_p_l_e_s:

     tN <- table(Ni <- rpois(100, lambda=5))
     r <- barplot(tN, col='gray')
     points(r, tN, type='h', col='red', lwd=2)#- type = "h" plotting *is* `bar'plot

     data(deaths, package = "base")
     mp <- barplot(deaths) # default
     tot <- apply(deaths,2,sum); text(mp, tot + 3, format(tot))
     barplot(deaths, beside = TRUE,
             col = c("lightblue", "mistyrose", "lightcyan",
                     "lavender", "cornsilk"),
             legend = rownames(deaths), ylim = c(0, 100))
     title(main = "Death Rates in Virginia", font.main = 4)

     barplot(t(deaths)[, 5:1], beside = TRUE,
             col = c("lightblue", "mistyrose",
                     "lightcyan", "lavender"),
             legend = colnames(deaths), ylim = c(0,80),
             main = "Death Rates in Virginia", font.main = 4)
             ## instead of title(.)

