Every time a researcher publishes a paper about DNA sequencing, all the sequences are uploaded to online databases.

One of these databases is https://www.ncbi.nlm.nih.gov/sra/

It contains all DNA reads made with New Generation Sequencers

We want to understand how fast this database is growing

• Download the file sra_bases.txt
• Create a new Rmarkdown document. Delete all unnecessary text
  • do not forget to write your student number
• write the code to read the file into your document
• write the code to produce a plot like the one at https://www.ncbi.nlm.nih.gov/sra/docs/sragrowth/

• The growth of databases is usually modeled as a semi-log linear model.
• Build a semi-log model and find
  • what is the factor of growth per day?
  • What will be the database size two years after the last entry in your table?
• write your code and comments in the same Rmarkdown file

• https://youtu.be/4pkAFmGZ6_M
• https://youtu.be/nr64gAbiZQw

YouTube has an option to show the video at 0.25 speed. Try it

• In your computer, open a new text file and write the experimental data
• three columns: msec, position, and replica
• one row for each time the object crosses a mark