Although many problems can be solved through the use of simple variables, as described previously, it is sometimes convenient or necessary to group data together in the form of vectors or matrices. For example, the list of component fractions for a mixture is best described as a set of real numbers xi, i=1,...,nc. This section describes the declaration and use of arrays, the entities in MATLAB that allow us to work with vectors and matrices. The introduction of these means that we need to look again at the use of standard mathematical operators in MATLAB.
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