Not sure what you are asking. Arrays are a dynamically-sized collection of elements, the elements can be simple booleans or arbitrarily complex structures, some arithmetic functions will operate on arrays (one ADD function will add a single number to all elements in an array, for example).
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As previously mentioned, arrays group data elements of the same type. You can build arrays of numeric, Boolean, path, string, waveform, and cluster data types. Arrays are useful when you are working with a collection of similar data and when you perform repetitive computations. They are particularly useful and ideal for storing data you collect from waveforms (data acquisition) or data generated in loops. Various array functions include array size, initialize array, array subset, build array, and index array. I am attaching an example VI that shows arrays and data acquisition. Also, refer to this thread as well as this thread for help on arrays and data acquisition.
Just thought I would give you a few more links to threads regarding arrays, frequency, and time domains. See this thread and this one for more references.
