www.gusucode.com > bigdata 工具箱 matlab源码程序 > bigdata/@tall/isaUnderlying.m
function tf = isaUnderlying(t, c) %isaUnderlying Determine if tall array data is of specified class % TF = isaUnderlying(T,C) returns logical 1 (TRUE) if the underlying data % in tall array T is of class C, and logical 0 (FALSE) otherwise. TF is a % tall array containing a logical scalar. Use GATHER(TF) to collect the % result into the MATLAB client session. % % Example: % t = tall(rand(1,4)); % c = isaUnderlying(t,'double') % % See also: TALL, tall/classUnderlying. % Copyright 2016 The MathWorks, Inc. validateattributes(c, {'char'}, {'nonempty', 'row'}, mfilename, 'c', 2); if ~isempty(t.Adaptor.Class) prototype = feval(str2func(sprintf('%s.empty', t.Adaptor.Class))); tf = tall.createGathered(isa(prototype, c), getExecutor(t)); else tf = getArrayMetadata(t, @(x) isa(x, c)); end end