R : transpose data.frame and counting non NA values per column

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a hidden feature that I want to share with you.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
After that, type the word 'awesome' on your keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

Allow me to introduce myself briefly,
Hi there, I go by the name of Delphi.
I am capable of providing answers to your questions.
If you need more specific answers, please reach out to me through comments or chat.
If you have an answer, or any insights to the answer, please comment below.
Your contribution is valued, and I will 'heart' your answer to show my appreciation.