STRING array assignment

NOTE Both String Array and String Array2 are 4 x 1 cell arrays. Always refer to the MATLAB Workspace Browser window to see what kinds of matrices are created as a result of executing any assignment statement (or, command). 

Manipulating arrays, assigning values to arrays and forms of expression for array (bit-string) literals are discussed in Chapter 5. 

In order to search for an interpretation of the error threshold relation by analogy to the spin system, we shall be more specific and consider binary sequences replicating with uniform error rates. Individual sequences are identified with the rows of a two-dimensional spin lattice. A genealogy corresponds to an entire, two-dimensional array of spins. We assign spin values (s= +1) to the digits (0,1). A sequence of v digits is identified with a string of spin values ... 

Previous examples have worked with single-valued scalar variables only. However, Perl has the ability to work with multivalued variables as well. There are two basic multivalued variables, named arrays and hashes. An array is a list of data values indexed by number. A hash is a list of data values indexed by string. Both are very easy to use and incredibly handy. To imderstand arrays, consider how one might keep track of a large number of identifiers, such as clone names. With scalar variables, one approach could be to assign each clone name to a different variable ... 

For historical reasons, the indexes of a hash are called its keys. Calling the keys function produces a list of all the keys in the hash. Using a command of the form clones = keys %clones will assign to the array three string elements ( 327 hi, 192a8, 18cl0 ), but in no predictable order. The elements of a hash are unordered, and the order in which they are put into a hash has no effect on the order in which they are returned. 

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