panel data not demeaning

Please I have a data like this in a panel form and would like to demean it in blocks as in the panel for each day. How do i go about it?

A DAY1 2

A DAY1 4

A DAY1 7

A DAY2 6

A DAY2 4

A DAY2 9

B DAY1 1

B DAY1 0.2

B DAY1 0.8

B DAY2 7

B DAY2 5

B DAY2 6

[Image Analyst]

What is "panel form"? What does "demean" mean to you?

What (how many and what class/type) variables would you like as an output and what should they contain?

Definition of demean

transitive verb

: to lower in character, status, or reputation

1. careful not to demean his opponent
2. demeaning the seriousness of the problem

[Kwasi Boateng]

To detrend the data

[Image Analyst]

OK. And for the other two questions? 🤔

[Kwasi Boateng]

I was using this function to detrend, Data-repmat(mean(Data), length(Data),1). But is not detrending on daily basis, I want the output to be an array

[Kwasi Boateng]

It’s a panel data. But the output should be an array or a column matrix.

[Image Analyst]

OK we're progressing, but very very slowly. Do you mean like a consumer panel where you ask people what they think about something, or you make measurements off the panelists, like their weight loss or something?

OK, Please complete this line, pretending that you have the output you want from your given example:

output = [.....what???????]

[Kwasi Boateng]

I want to compute the mean for each set of days and deduct it from the respective entries. Want the output to be like a matrix.