Writing a file to a S3 managed folder from R (eg via ggsave)

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Pascal_B
Pascal_B Registered Posts: 10 ✭✭✭✭

Hello,

I am not able to write a file to managed folder (hosted on S3) from R. Can you help ?

My current usecase is using ggsave to save a plot to a .png file on a managed folder.

Reading the doc, I found dkuManagedFolderUploadPath function, but I can not figure what would be a relevant value for the "data" argument (from the doc : "data must be a connection providing the data to upload")

How can I generate this "data" in my context along ggplot / ggsave workflow ?
Could you provide me some explanations and a working toy example so I can figure out the steps ?

Thanks for your help
Pascal

Best Answer

  • Alexandru
    Alexandru Dataiker, Dataiku DSS Core Designer, Dataiku DSS ML Practitioner, Dataiku DSS Adv Designer, Registered Posts: 1,209 Dataiker
    edited July 17 Answer ✓
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    Hi @Pascal_B
    , @tanguy
    ,

    In your case, if you are looking to upload a ggplot png or pdf you can simply save it to a tempfile. Then read that file and upload it to the remote (S3) managed folder. Below is a code sample:

    library(dataiku)
    library(ggplot2)
    
    #define folder ID and filename here
    
    output_folder = 'NP2gVabt'
    output_filename = 'testing'
    
    # Just for testing create some plots
    p1 <- ggplot(mtcars, aes(wt, mpg)) + geom_point()
    
    # create tempfile with ggsave
    png_file <- tempfile()
    
    ggsave(png_file, device = "png", plot = p1)
    
    #create a connection to the temp file
    tmp_png_file_connection <- file(png_file, "rb")
    
    #write to the managed folder
    dkuManagedFolderUploadPath(output_folder, paste(output_filename,'png',sep='.'), tmp_png_file_connection)
    
    #close the connection and remove temp file
    close(tmp_png_file_connection)
    unlink(png_file)
    
    

    If you want to write a dataset e.g csv you can do a similar approach using write.csv to a tempfile and then reading and upload that as the "data".

    Let me know if this works for you or if you have any other questions.

Answers

  • Tanguy
    Tanguy Dataiku DSS Core Designer, Dataiku DSS & SQL, Dataiku DSS ML Practitioner, Dataiku DSS Core Concepts, Neuron, Dataiku DSS Adv Designer, Registered, Dataiku DSS Developer, Neuron 2023 Posts: 112 Neuron
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    I have the same need as @Pascal_B
    : how to save files with R into a S3 folder (I have not found the equivalent of saving files using streaming with python) ?

  • Tanguy
    Tanguy Dataiku DSS Core Designer, Dataiku DSS & SQL, Dataiku DSS ML Practitioner, Dataiku DSS Core Concepts, Neuron, Dataiku DSS Adv Designer, Registered, Dataiku DSS Developer, Neuron 2023 Posts: 112 Neuron
    Options

    I have the same need as @Pascal_B
    : how to save files with R into a S3 folder (I have not found the equivalent of saving files using streaming with python) ?

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