does anyone know how we enter data manually into "uitable"?

Answer 1

[Image Analyst]

What do you mean by manually?

1. By the user directly typing into the cells of the table, or
2. By programmatically sending some data to the table?

If (1), just run the app by clicking on the green run triangle and have the user click inside a cell and start typing.

if (2), just do this

handles.uitable1.Data = yourMatrix; % Or your cell array.

Answer 2

[Ajay Kumar]

One option could be writing callback to button(Enter data) wherein we use inputdlg to get the user inputs for all values and assigning it to uitable there itself.

doc inputdlg