Categories: r, ggplot2

How to indicate y axis does not start from 0 in ggplot?

1 answer

How can I break the the y axis not starting from 0 in my plot? I guess it can't be done with ggplot. Any other solutions?

I want to get this: enter image description here

My ggplot:

ggplot(allEvents %>% dplyr::filter(FixationID>1,FixationID<15), aes(FixationID, Fixation)) +   geom_line(stat="summary", fun.y=mean, position="identity") + theme_bw() + stat_summary(      labs (x = "Ordinal fixation number", y = "Fixation duration (s)") +     scale_y_continuous (name="Fixation duration (s) ", limits=c(0.1, 0.4)) +    scale_x_continuous (name="Ordinal fixation number", breaks=c(5,10,15,20)) +    geom_smooth(method=lm) 

Excerpt from my data:

structure(list(Fixation = c(0.383, 0.185, NA, 0.312, NA, 0.328,  NA, 0.259, NA, 0.335), FixationID = c(1, 2, NA, 3, NA, 4, NA,  5, NA, 6)), .Names = c("Fixation", "FixationID"), row.names = c(NA,  10L), class = "data.frame") 

All answers to this question, which has the identifier 61238993

The best answer:

As mentioned by @teunbrand's comment, ggplot2 does not allow for axis breaks, s it is really tricky to get it done.

Alternatively, you can plot your graph in base r plot, and use axis.break function from plotrix package.

(NB: I used between function from dplyr to select the subset of data you are interested by. Your dataset is called df in my example).

library(dplyr)  library(plotrix)  with(subset(df, between(FixationID,2,15)),      plot(x = FixationID, y = Fixation, type = "b", ylim = c(0.1,0.4), pch = 16)) with(subset(df, between(FixationID,2,15)),      abline(lm(Fixation~FixationID),col = "blue")) axis.break(axis = 2, breakpos = 0.1, style="slash") 

enter image description here

Does it answer your question ?

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