Merge 2 dataframes if value within range

Question

I have been struggling with this for some time now and couldn\'t find any way of doing it, so I would be incredibly grateful if you could help! I am a novice in programming

Answer 1

You can use sqldf package:

library(sqldf)

#dummy data
fixes <- read.table(text="
Order Participant Sentence Fixation StartPosition
1       1          1         1       -6.89
2       1          1         2       -5.88
3       1          1         3       -5.33
4       1          1         4       -4.09
5       1          1         5       -5.36 
",header=TRUE)
zones <- read.table(text="
Sentence     Zone  ZoneStart   ZoneEnd
1           1     -8.86      -7.49
1           2     -7.49      -5.89
1           3     -5.88      -4.51
1           4     -4.51      -2.90
",header=TRUE)

#output merged result
res <- 
  sqldf("SELECT [Order],Participant,f.Sentence,Fixation,StartPosition,Zone
       FROM fixes f,zones z
       WHERE f.Sentence=z.Sentence AND
             f.StartPosition>=z.ZoneStart AND
             f.StartPosition