What interpolation means and how to do it

Hi,

I have X data of time (date format) and Y data of depth; I need to interpolate Z data of water temperature. What in simpler terms mean and how can I do it on Matlab?

Below my sets of data and a plot so far displaying depth against time.

Thank you in advance for your help!

[Torsten]

Take a look at MATLAB's "interp2" to see how you have to supply time, depth and temperature for MATLAB in order to be able to use interpolation.

[Stephen23]

"What in simpler terms mean and how can I do it on Matlab?"

https://www.mathworks.com/help/matlab/interpolation.html

[Giulia]

Thanks both, I have read everything on Matlab, and I think I got how to create the meshgrid and apply the interp2 function, I just don't know how to do it with my (x) time variable, as it's got date and time in the format '04/07/2022 18.00'

[Stephan]

You could use datenum to create the needed input format for interp2 - but it is not recommended to use it. It's just a quick and dirty approach.