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Added the possibility to extract variables from dynSeries object using indices instead of variable names.

If ts is a dynSeries object containing variables A1, A2, A3, A4, A5, then the following syntaxes are equivalent:

ts{[1, 2, 5]}

ts{'A1','A2','A5'}

and will create a new dynSeries object made of variables A1, A2 and A5.

If ts is a dynSeries object, then the following syntax is valid:

t0 = dynDate('1950Q1') ;
t1 = dynDate('2000Q3') ;

range = t0:t1 ;
ds = ts(range);

Note that the dates in range do not need to be contiguous or sorted in increasing order.

  previous commit

  dynDates; dynDate can be initialized with a single dynDate

Following syntax:

ts{'GDP_US'} = ts.{'GDP_US'}.log

applies the log function to the variable GDP_US in the dynSeries object ts. Note that this works on an arbitrary number of variables and that regular expressions can be used (see previous commits).

The following syntax

A.name{i}

where A is a dynSeries object, returns the name of the i-th variable in A.

Added the possibility to select variables in a dynSeries object. It is possible to use regular expressions.  Examples are given in unitary test #6 of subsref overloaded method.

For instance, the following syntax is allowed:

dbload = dynSeries();
mydata = dbload('data_file.csv');

For instance, the follwing syntax is allowed:

data = dynSeries('mydata.csv');

assuming that the csv file is in the matlab's path.

Completed the overloaded subsref method. Give access to the Time member, which is an object instantiated by @dynTime/dynTime.