How can I "reshape" a data set?

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Art 2015-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/224593-how-can-i-reshape-a-data-set

回答： Walter Roberson 2015-6-19

This is probably simple: I have a data file of decimals, each one equal to 1 byte:

Each variable I have is n bytes long, so I need to read 'n' bytes of this data and convert it into a single number. I can do this by (assume n = 4 and little endian):

4byte_var = hex2dec(strcat(dec2hex(datastream(12),2),dec2hex(datastream(11),2),dec2hex(datastream(10),2),dec2hex(datastream(9),2)))

This changes the dec values to hex, strcats them together, then changes the entire hex string back to decimal.

I've tried using reshape and shiftdata to automatically rearrange the data so I can do this whole step "eloquently", but I've failed to find a solution.