Pfthb

I have a textfile with tuples of integer data, which I want to plot in a simple graph.
The textfile ("test.txt") looks like this. All tuples are separated by tabs.

Textfile (test.txt)

(1,2) (1,3) (2,8) (3,12) (5,82) (...)

R-Code

m = read.table('test.txt', header = FALSE, sep='t')
plot(log(m[,1]), log(m[,2]))

As a result I'm getting

Error in Math.factor(m[,1]): 'log' not meaningful for factors

What I can understand is, that my data-tuples are not read in as numeric values but as factors. Accordingly the 'log'-operator is not able to operate on these (factor-)values.
So my idea has been to convert factors to numeric, but I'm failing in converting the data. Furthermore I'm not sure if this is the solution for my problem.

What I would like to have is a 2d-graph with (x,y)-values as axis.

Maybe someone has an idea how to handle it.

--- EDIT ---

library(readtext)
library(ggplot2)


DATA_DIR <- system.file("extdata/", package = "readtext")

mytab = readtext(paste0(DATA_DIR, "/hlra/*"))
# readtext object consisting of 1 document and 0 docvars.
# # data.frame [1 x 2]
# doc_id text 
# <chr> <chr> 
# 1 sample_tuple_file.txt ""(1,2), (1,"..."
mytuple = strsplit(mytab$text, ', ')
mytuple = mytuple[[1]]

substring(mytuple[1], 2, 2) # get x value
substring(mytuple[1], 4, 4) # get y value 

x = c()
y = c()

for (i in 1:length(mytuple))
 my_x = substring(mytuple[i], 2, 2)
 my_y = substring(mytuple[i], 4, 4)
 x <- c(x, my_x)
 y <- c(y, my_y)
 rm(my_x)
 rm(my_y)


mydata = data.frame(x = x, y = y)

ggplot(data = mydata, aes(x = x, y = y)) + 
geom_point()

So, I've tested the Code above. But it's not working for all datas. The resulting plot just the first value. I've reorganised my text-file, so every single tuple ends with a comma and tab.

plot from code above

I'm completly new to R so I'm sure I'm missing some obviously mistakes in my code. By the way I had to change some code to get it run in R-Studio (added missing library (ggplot2 and readtext) and change file-directory.

Assuming you have this kind of text file:

(1,2) (1,3) (2,8) (3,12) (5,82) (...)

I recommend using read_text. Work out with vectors and strings to prepare data in the format that's ready for plotting.

#if packages aren't yet included in R import them by using R-console
#Command: install.packages("package-name")
#import library "readtext" 
library(readtext)
#install library "ggplot2"
library(ggplot2)

#get directory from "readtext"-package which is in my case...
#C:Usersyour_nameDocumentsRwin-library3.5readtextextdatayour_folder
DATA_DIR <- system.file("extdata/", package = "readtext")

#the textfile you want to plot should be in folder "your_folder"
mytab = readtext(paste0(DATA_DIR, "your_folder/*")
# readtext object consisting of 1 document and 0 docvars.
# # data.frame [1 x 2]
# doc_id text 
# <chr> <chr> 
# 1 sample_tuple_file.txt ""(1,2), (1,"..."

mytuple = strsplit(mytab$text, 't')
mytuple = mytuple[[1]]

substring(mytuple[1], 2, 2) # get x value
substring(mytuple[1], 4, 4) # get y value 

x = c()
y = c()

for (i in 1:length(mytuple))
 my_x = substring(mytuple[i], 2, 2)
 my_y = substring(mytuple[i], 4, 4)
 x <- c(x, my_x)
 y <- c(y, my_y)
 rm(my_x)
 rm(my_y)


mydata = data.frame(x = x, y = y)

ggplot(data = mydata, aes(x = x, y = y)) + 
 geom_point()