gusucode.com > datatypes 工具箱matlab源码程序 > datatypes/@categorical/double.m
function b = double(a) %DOUBLE Convert categorical array to DOUBLE array. % B = DOUBLE(A) converts the categorical array A to a DOUBLE array. Each % element of B contains the category index for the corresponding element of A. % % Undefined elements of A are assigned the value NaN in B. % % See also SINGLE. % Copyright 2006-2013 The MathWorks, Inc. b = double(a.codes); b(b == 0) = NaN;