CODEWITHSUNDEEP
rplot
jo.H
jo.H

Reputation: 69

plot: y axis as factor in R

I'm struggling with a plot. I have a vector "a": 

   h1    h2    h3    h4 
1.000 0.880 0.746 0.761

These are data of normalized concentration of an element in a soil profile.

I would like to have on the x axis the concentration (1, 0.880, 0.746, 0.761) and on the y axis the different horizons (h1, h2, h3, h4). But I would like the y axis to go downward (as in a soil profile), and the x axis on the top of that plot.

Here's what I've got so far: (I have tried many other things but without success) 

test=factor(names(a))
plot(a,test)
axis(3)

This shouldn't be so hard but even after checking ?axis, ?plot and ?par, I can't manage to get what I want.

Upvotes: 0

Views: 262

Answers (1)

akash87
akash87

Reputation: 3994

Instead of that, you may want to customize your plot:

require(ggplot2)
a <- data.frame(horizon = c("h1", "h2", "h3", "h4"), vals = c(1.000, 0.880, 0.746, 0.761))
ggplot(a, aes(x = vals, y = horizon)) +
  geom_point() +  
  scale_y_discrete(limits = rev(levels(a$horizon)))+
  scale_x_continuous(position = "top")

The ggplot2 package is far easier to customize.

Upvotes: 1

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