Matrix Attributes

The attributes of a matrix, such as how many rows it has, are accessible in several ways. All attributes are accesible through function calls, for example:

> my_matrix = [ 1, 0.333, 0.367, 0.24;
>               6, -0.3, 0.9, 3];
> show(my_matrix)
   name:      my_matrix  
   class:     num        
   type:      real       
     nr:      2          
     nc:      4          
> size(my_matrix)
        2          4  
> length(my_matrix)
        4
> class(my_matrix)
num
> type(my_matrix)
real
> name(my_matrix)
my_matrix

You can learn more about each of those functions by refering to the Function Reference, or by using the on-line help. Matrix attributes are also accessible via a shorthand notation:

> // Number of rows
> my_matrix.nr
        2
> // Number of columns
> my_matrix.nc
        4
> // Number of elements
> my_matrix.n
       8
> // Class of variable
> my_matrix.class
num
> // Type of contents
> my_matrix.type
real