Split vector to sub vectors of equal size

I have a lond vector of measurements taken every 15 mins for 3 months and want to seperate this in measurements of each day

What should I use?

Answer 1

[Star Strider]

If the sampling times are uniform (constant sampling intervals between the observations) use the Signal Processing Toolbox buffer function.

v = randn(1,4*24*2)                                           % Two Days' Measurements

v = 1×192

-1.7302 0.5357 0.2997 -0.6569 -3.1447 -0.7573 1.5844 -0.9395 0.3383 2.1405 0.6417 0.2237 -0.0870 0.4797 1.7342 -0.1422 0.5905 1.5697 -1.8996 -0.3106 -0.1646 0.1758 0.5955 1.0822 1.1760 0.4522 0.0625 -0.0768 0.7376 0.1185

rowLengths = 24*60/15;
vdays = buffer(v, rowLengths)

vdays = 96×2

-1.7302 0.4966 0.5357 1.3182 0.2997 -0.2318 -0.6569 -1.8533 -3.1447 -0.2428 -0.7573 0.0566 1.5844 0.7537 -0.9395 0.0877 0.3383 -0.2104 2.1405 0.4684

The reshape function is also an option, however buffer is easier to use.

I have a simple emulation of the buffer function (does not do everything) I can post if theSignal Processing Toolbox is not available.

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