Match Array coordinate and size

I have two arrays with different size one is 241x241 and another one is 321x321.

I want to match the size because my dimensions of arrays being concatenated are not consistent. Anyone knows how to match it?

[DGM]

That depends entirely on what you want, the dimensions along which you're trying to concatenate, and how the data needs to be colocated.

Would it be meaningful to discard part of the larger array? Which part should be discarded?

Would it be meaningful to pad the smaller array? Which sides should be padded? What would be an appropriate padding value?

Would it be meaningful to scale one of the arrays to match the other? Which one should be scaled? What interpolation would be appropriate?

[N.Dyana Koo]

I see. thank you so much for your suggestions.

I got the ideas now. thanks!