How to take a difference within the data of the same city but not across the city, Part 2

Suppose I have table T

City Date Cumulative_Visitors
-----------------------
NY January 1 100
NY January 2  150
NY January 3  200
SF January 1 70
SF January 2 200
SF January 3 400

In Part 1, I learned to create a 2*1 cell U where the first cell is the data of new_visitors for NY and the second cell is the data of new_visitors for SF. How can one merge T and U?

[Image Analyst]

You posted this before and in my answer I suggested some functions and asked you to post your "dataset" so we could help you more easily. Did you see that in your duplicate question?

[alpedhuez]

I posted the dataset in the previous post.

[John D'Errico]

Calling the identical question part 2 and part 3 does not make it differnt. If you wanted to add information, then add it to the FIRST question, by editing your question. I will close additional questions you ask of this form.

[alpedhuez]

Thought easier to understand that this is a question derived in the process of solving the first question that can be applied to other questions.

Answer 1

[Ameer Hamza]

Same answer as this: https://www.mathworks.com/matlabcentral/answers/685423-how-to-take-a-difference-within-the-data-of-the-same-city-but-not-across-the-city