I have 13 waves of dataset. There are 21 columns for each dataset. I need to make a panel out of it which I have no idea how to do it. There is only one common column which is pidp as can be seen from the photos.
Can you describe me how to write a code for it in a detailed manner?
[enter image description here](https://i.sstatic.net/iz69Pyj8.png)
I tried chatgpt codes, none worked.
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