R script into deployed app

Deployment
1

Hi guys,

I am trying to create a heatmap from an Rscript into my Streamlit app. I click on a button and it’s calling the Rscript, running the data and saving the heatmap as a pdf in my repo.

It runs on my local machine but not during the deployment on Streamlit.io.

Is R available in deployment?

Here is the code:

    process = subprocess.Popen(["Rscript", "heatmap.R"])#, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
    result = process.communicate()

    def displayPDF(file):
        # Opening file from file path
        with open(file, "rb") as f:
            base64_pdf = base64.b64encode(f.read()).decode('utf-8')

        # Embedding PDF in HTML
        pdf_display = F'<iframe src="data:application/pdf;base64,{base64_pdf}" width="700" height="1000" type="application/pdf"></iframe>'

        # Displaying File
        st.markdown(pdf_display, unsafe_allow_html=True)

I have a requirements.txt file with my python libraries and a packages.txt file for R with the following :

r-base
r-base-dev
r-cran-gplots
r-cran-gplot2

Thank you guys, any help is appreciated!

2

Hi @Sgt_Tux

Instead of a PDF file, could you saving the plot as an image file and then use st.image() to display the image.

A code snippet from this repo is shown below:

process2 = subprocess.Popen(["Rscript", "plot.R"], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
result2 = process2.communicate()
image = Image.open('plot.png')
st.image(image)

A complementary video showing this is here.

3

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