Dr.R Scatterplot in R

### Scatterplot

A scatterplot appears to be the simplest representation of the realtionship between two numeric variables. They can be drawn as points with x- and y-coordinates into a coordinate system using the  `plot()`-function . The `plot()`-function has a lot of arguments in order to adjust the look of the plot (e.g. the poicht character `pch =`, the character extent `cex =`, the axis limits `xlim = ylim =`, and much more.)

The help pages `?plot` and `?par` are worth a look!

The `lines()`-function adds other lines to the plot, a polygon, e.g. representing a confidence interval, can be added using the `polygon()`-function.

Some more explanations and examples can be found in this Video (in German): Scatterplot R

This graphic was created using the following code:

``````x <- seq(-20, 10, len = 200)

fn <- 705.87 + 1.201 * x + -3.0554 * x^2 + -0.10117 * x^3
jfn <- jitter(fn, 10000)

plot(x, jfn, ylab = "f(x)", las = 1)
rect(par("usr"), par("usr"), par("usr"), par("usr"), col = "grey80")
for(i in seq(-20, 10, 5)) abline(v = i, col = "white")
for(i in seq(200, 800, 200)) abline(h = i, col = "white")
points(x, jfn, pch = 19)
lines(x, fn, lwd = 2, col = "red")
polygon(c(x, rev(x)), c(fn - sd(fn), rev(fn + sd(fn))), col = adjustcolor(4, 0.2), border = NA)``````

#### Tags

Scatterplot, cloud of points, trend line, confidence interval, different colors, colours, transparency, background colors, dependent size, dependent colors, x-axis, y-axis, bottom, left, top, right, labels, without ggplot

#### Tags

Scatterplot, Streudiagramm, Punktdiagramm, Punktwolke, Trendlinie, Konfidenzintervall, Vertrauensbereich, verschiedene Farben, Transparenz, Hintergrundfarbe, abhängige Größe, abhängige Farbe, x-Achse, y-Achse, unten, links, oben, rechts, Beschriftung, ohne ggplot, Datenanalyse mit R, Hausarbeit, Bachelorarbeit, Masterarbeit