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transform data from hourly to quarter hourly

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Hi everyone, I kindly ask you for help for a problem that I am facing, basically I have hourly data of active power produced by photovoltaic systems.
I would like to broaden the resolution of this data, transforming it from hourly to quarter hourly with some sort of fitting or interpolation.
How can it be done? is there any function on matlab that can help me?
Here is an example excel file.
Thanks in advance for your help.
Giuseppe D'Amico
Giuseppe D'Amico on 16 Dec 2020
but what timestep should I write to have them in the quarter hour? and what interpolation method should I use?

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Accepted Answer

Daniel Pollard
Daniel Pollard on 15 Dec 2020
The vector x can be datetime values.
Daniel Pollard
Daniel Pollard on 17 Dec 2020
Excellent, I'm glad you managed to get it working. If you could accept the answer so other users know what helped solve your problem that would be great.

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