Module JBLAS::MatrixClassMixin
In: lib/jblas/mixin_class.rb

Mixin for the Matrix classes. These basically add the [] construction method (such that you can say DoubleMatrix[1,2,3]

Methods

[]   from_array  

Public Instance methods

[](*data)

Create a new matrix. For example, you can say DoubleMatrix[1,2,3].

See also from_array.

[Source]

# File lib/jblas/mixin_class.rb, line 42
    def [](*data)
      from_array data
    end
from_array(data)

Create a new matrix. There are two ways to use this function

pass an array:Constructs a column vector. For example: DoubleMatrix.from_array 1, 2, 3
pass an array of arrays:Constructs a matrix, inner arrays are rows. For example: DoubleMatrix.from_array [[1,2,3],[4,5,6]]

See also [], JBLAS#mat

[Source]

# File lib/jblas/mixin_class.rb, line 55
    def from_array(data)
      n = data.length
      if data.reject{|l| Numeric === l}.size == 0
        a = self.new(n, 1)
        (0...data.length).each do |i|
          a[i, 0] = data[i]
        end
        return a
      else
        begin
          lengths = data.collect{|v| v.length}
        rescue
          raise "All columns must be arrays"
        end
        raise "All columns must have equal length!" if lengths.min < lengths.max
        a = self.new(n, lengths.max)
        for i in 0...n
          for j in 0...lengths.max
            a[i,j] = data[i][j]
          end
        end
        return a
      end
    end

[Validate]