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I'm new in R
can you give me some example code I need use to read and write tiff image in R
or just list the step
Thanks
Google is going to be your friend when learning R. It's old enough that everything is out there. :)
Tiff Package
To install this, you might want to try :
install.packages("tiff")
But if you want to use it put this at the top of each script
library("tiff")
To read and write I suggest :
writeTIFF(yourdatahere, getwd())
You don't assign a name to it because you are just outputting data at this point. Here is getting a TIFF.
TiffObject <- readTIFF(yourfile)
Make sure your file is in your working directory. You can set your working directory by doing :
setwd(path)
If you need anything else, just comment and I shall help.
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I am trying to save my table (created via tab_model) in the viewer of R. Nothing I have found so far works as it is not a dataframe. I am getting messages like
$ operator not defined for this S4 class
Has anyone an idea how I could save it nevertheless?
Try,
library(sjPlot)
library(webshot)
tab_model(dat, file = "plot.html")
#save as image
webshot("plot.html", "plot.png")
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Unfortunately I have to deal with a data file with .int file format. This has the effect of littering any search results with unrelated information about integers.
I can't figure out how to open this file in R. I have an example with the Julia language, shown below:
filename = "mnist_train.int"
open(filename) do f
...
end
But when I try to search for a similar function in R, I either find results about opening excel files, results for other languages, or results that deal with integers. Could someone please point me to some resources for dealing with this filetype?
Because I am not sure about what the content type, guess you trying to open a binary file format.
You can have a look at ?readBin
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I'm struggling to find the answer to this very basic question and to make the here() function work (from the here package). I'd be glad if someone could help me with that.
What's a file .here mentionned in this github? And how can I create one ?
I've tried adding a text file called '.here.txt' in my workflow (where I want the here() function to "start") but it doesn't work.
You don't need a here file. That's one of the possibilities though. But if you want to use that route then make a file called .here
Not .here.txt or here.txt or any other variant you can think of. Literally just .here
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I would like to classify pictures by using R software. I have no knowledge in image processing so it will be great if someone would point me to the right direction. First, how can I turn a picture that I have into a structured dataframe so I'll be able to analyze it? Is there a package for this task? Second, Is there a defined process for picture classification that I can follow?
With this lines you can load images in R and store them in a list.
library(jpeg)
setwd("path/to/folder/with/images/")
pics <- dir()
all_images <- NULL
for(z in pics){
all_images[[z]] <- readJPEG(z, native = T)
}
# check the first image in the list
plot(1:2, type='n')
rasterImage(all_images[[1]],1,1,2,2)
for processing images you can use the imager package.
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Running Compile Notebook from RStudio.
I am getting:
Error: could not find function "SegNeigh"
"SegNeigh" being my own function, properly sourced; the script runs fine without R Markdown.
Any help appreciated.
In order for the rmarkdown doc to find the function, you either need to define SegNeigh in the same document or place it in another file and source that file explicitly