b = double(A)
b = double(a,vars)
b = double(A) returns the contents of the dataset A, converted to one double array. The classes of the variables in the dataset must support the conversion.
b = double(a,vars) returns the contents of the dataset variables specified by vars. vars is a positive integer, a vector of positive integers, a variable name, a cell array containing one or more variable names, or a logical vector.