What is the difference between working with matrix and array?

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alpedhuez
alpedhuez 2022-7-15
评论： alpedhuez 2022-7-15
I have a data where the first dimension is month, the second dimension is city, and the third dimension is a vector of temperature of the city in that month. it is 12 (months) * 10 (cities) * 30 (temperature). Is it easier to work with a 120*30 matrix or with a 12*10*30 array?
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Steven Lord
Steven Lord 2022-7-15
FYI your usage of * as a separate between dimension sizes usually takes me take a second to interpret. If you say your matrix is size 120*30 does that mean that size returns [120 30] or does it mean you called something like zeros(120*30) to preallocate it?
I'd advise using either "size [120 30]", "120-by-30", or "120 x 30". Or you could copy and paste from the Command Window display, which uses × instead of either * or x.
@dpb, if the plan is to analyze the data based on time and/or days, storing it as a timetable may be useful.

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