Dear R users,
I want to plot a one variable continuous function f(x) vs x, x=[0,1]. Say
for example: f(x)= x^2. Now, using the command plot(f~x) I will get a
curve where the range of x-axis is [0,1] with all equispaced label. But, I
need something else, and that is: my curve will be such that 80% on x-axis
the range would be [0,0.5] and the rest 20% would contain [0.5,1]. Let me
draw informally here. Say, the line below is my x-axis in graph and my
plotting points are like:
________________________________________
0 0.01 0.1 0.5 1
Any help or suggestion will be highly appreciable.
Regards,
Ritwik
ISI Kolkata
Query on R plot : Unequispaced label on x-axis
2 messages · ritwik_r at isical.ac.in, Duncan Murdoch
On 24/07/2013 10:06 AM, ritwik_r at isical.ac.in wrote:
Dear R users, I want to plot a one variable continuous function f(x) vs x, x=[0,1]. Say for example: f(x)= x^2. Now, using the command plot(f~x) I will get a curve where the range of x-axis is [0,1] with all equispaced label. But, I need something else, and that is: my curve will be such that 80% on x-axis the range would be [0,0.5] and the rest 20% would contain [0.5,1]. Let me draw informally here. Say, the line below is my x-axis in graph and my plotting points are like:
________________________________________
0 0.01 0.1 0.5 1
Any help or suggestion will be highly appreciable.
Construct a function pos(x) that takes the x values and converts them into the position on the axis that you want. For example, pos <- function(x) log(x + 0.001) plot(pos(x), y, xaxt="n") will plot the transformed values, with no x axis labels. To get the labels, use xvals <- c(0, 0.01, 0.1, 0.5, 1) # or whatever makes sense axis(1, at=pos(xvals), labels=xvals) Duncan Murdoch