Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and chemometrics......click here for more. 
Home Math Background Vectors Fundamentals  
See also: matrix algebra  
Vectors  IntroductionVectors form the basis for many mathematical methods and are important for data analysis. Note that a vector may be seen as a 1byn matrix.
To denote a specific vector, we shall use a lowercase, bold letter, such as a, for example. Whether this vector a is a column or row vector, will usually be clear from the context in which the letter is used. When written explicitly, vectors are put in parenthesis.
To denote a certain element of a vector, we shall use a lowercase letter (to specify the vector of which we are taking an element) with an index (for the index within the vector), such as a_{2}, for example.
It is an important aspect of vector and matrix algebra that we have two sets of objects to handle: the vectors (or matrices, respectively) as an entity and the scalars contained in these entities (however, matrices can also be seen as vectors of vectors of scalars).


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