EVOLUTION-MANAGER

Edit File: aes_position.html

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<table width="100%" summary="page for aes_position {ggplot2}"><tr><td>aes_position {ggplot2}</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Position related aesthetics: x, y, xmin, xmax, ymin, ymax, xend, yend</h2>

<h3>Description</h3>

<p>The following aesthetics can be used to specify the position of elements:
<code>x</code>, <code>y</code>, <code>xmin</code>, <code>xmax</code>, <code>ymin</code>, <code>ymax</code>, <code>xend</code>, <code>yend</code>.
</p>

<h3>Details</h3>

<p><code>x</code> and <code>y</code> define the locations of points or of positions along a line
or path.
</p>
<p><code>x</code>, <code>y</code> and <code>xend</code>, <code>yend</code> define the starting and ending points of
segment and curve geometries.
</p>
<p><code>xmin</code>, <code>xmax</code>, <code>ymin</code>  and <code>ymax</code> can be used to specify the position of
annotations and to represent rectangular areas.
</p>

<ul>
<li><p> Geoms that commonly use these aesthetics: <code><a href="geom_linerange.html">geom_crossbar()</a></code>,
<code><a href="geom_segment.html">geom_curve()</a></code>, <code><a href="geom_linerange.html">geom_errorbar()</a></code>, <code><a href="geom_path.html">geom_line()</a></code>, <code><a href="geom_linerange.html">geom_linerange()</a></code>,
<code><a href="geom_path.html">geom_path()</a></code>, <code><a href="geom_point.html">geom_point()</a></code>, <code><a href="geom_linerange.html">geom_pointrange()</a></code>, <code><a href="geom_tile.html">geom_rect()</a></code>,
<code><a href="geom_segment.html">geom_segment()</a></code>
</p>
</li>
<li><p> See also <code><a href="annotate.html">annotate()</a></code> for placing annotations.
</p>
</li></ul>

<h3>Examples</h3>

<pre>

# Generate data: means and standard errors of means for prices
# for each type of cut
dmod &lt;- lm(price ~ cut, data = diamonds)
cut &lt;- unique(diamonds$cut)
cuts_df &lt;- data.frame(
  cut,
  predict(dmod, data.frame(cut), se = TRUE)[c("fit", "se.fit")]
)
ggplot(cuts_df) +
  aes(
   x = cut,
   y = fit,
   ymin = fit - se.fit,
   ymax = fit + se.fit,
   colour = cut
  ) +
  geom_pointrange()

# Using annotate
p &lt;- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point()
p
p + annotate(
  "rect", xmin = 2, xmax = 3.5, ymin = 2, ymax = 25,
  fill = "dark grey", alpha = .5
)

# Geom_segment examples
p + geom_segment(
  aes(x = 2, y = 15, xend = 2, yend = 25),
  arrow = arrow(length = unit(0.5, "cm"))
)
p + geom_segment(
  aes(x = 2, y = 15, xend = 3, yend = 15),
  arrow = arrow(length = unit(0.5, "cm"))
)
p + geom_segment(
  aes(x = 5, y = 30, xend = 3.5, yend = 25),
  arrow = arrow(length = unit(0.5, "cm"))
)

# You can also use geom_segment() to recreate plot(type = "h")
# from base R:
counts &lt;- as.data.frame(table(x = rpois(100, 5)))
counts$x &lt;- as.numeric(as.character(counts$x))
with(counts, plot(x, Freq, type = "h", lwd = 10))

ggplot(counts, aes(x = x, y = Freq)) +
  geom_segment(aes(yend = 0, xend = x), size = 10)
</pre>

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