How to plot a function curve in R

Question

What are the alternatives for drawing a simple curve for a function like  eq   function x  x x    in R   It sounds such an obvious question  but I could only find these related questions on stackoverflow  but they are all more specific   Plot line function in R Plotting functions on top of datapoints in R  How can I plot a function in R with complex numbers  How to plot a simple piecewise linear function  Draw more than one function curves in the same plot   I hope I didn t write a duplicate question

User · Accepted Answer

You mean like this    gt  eq   function x  x x   gt  plot eq 1 1000   type  l        Or whatever range of values is relevant to your function

User · Answer

plot has a plot function method  plot eq  1  1000    Or  curve eq  1  1000

User · Answer

I did some searching on the web  and this are some ways that I found   The easiest way is using curve without predefined function  curve x 2  from 1  to 50    xlab  x   ylab  y       You can also use curve when you have a predfined function  eq   function x  x x  curve eq  from 1  to 50  xlab  x   ylab  y       If you want to use ggplot   library  ggplot2   eq   function x  x x  ggplot data frame x c 1  50    aes x x        stat function fun eq

User · Answer

Lattice solution with additional settings which I needed   library lattice  distribution lt -function x   2  -x 2   X lt -seq 0 10 0 00001  xyplot distribution X  X type  l   col   rgb red   255  green   90  blue   0  maxColorValue   255   cex lab   3 5  cex axis   3 5  lwd 2      If you need your range of values for x plotted in increments different from 1  e g  0 00001 you can use        X lt -seq 0 10 0 00001     You can change the colour of your line by defining a rgb value       col   rgb red   255  green   90  blue   0  maxColorValue   255     You can change the width of the plotted line by setting       lwd   2    You can change the size of the labels by scaling them       cex lab   3 5  cex axis   3 5

User · Answer

As sjdh also mentioned  ggplot2 comes to the rescue  A more intuitive way without making a dummy data set is to use xlim  library ggplot2  eq  lt - function x  sin x   base  lt - ggplot     xlim 0  30  base   geom function fun eq   Additionally  for a smoother graph we can set the number of points over which the graph is interpolated using n  base   geom function fun eq  n 10000

User · Answer

Here is a lattice version   library lattice  eq lt -function x   x x  X lt -1 1000 xyplot eq X  X type  l

[r] How to plot a function curve in R

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