A = [3 NaN 5 6 7 NaN NaN 9]; TF = ismissing(A) 则TF=

A = [3 NaN 5 6 7 NaN NaN 9];TF = ismissing(A)则TF=( ) A: 0 1 0 0 0 1 1 0 B: 2 6 7 C: 1 3 4 5 8 D: 以上都不对

dblVar = [NaN;3;5;7;9;11;13]; singleVar = single([1;NaN;5;7;9;11;13]); cellstrVar = {'one';'three';'';'seven';'nine';'eleven';'thirteen'}; charVar = ['A';'C';'E';' ';'I';'J';'L']; categoryVar = categorical({'red';'yellow';'blue';'violet';'';'ultraviolet';'orange'}); dateVar = [datetime(2015,1:2:10,15) NaT datetime(2015,11,15)]'; stringVar = ["a";"b";"c";"d";"e";"f";missing]; A = table(dblVar,singleVar,cellstrVar,charVar,categoryVar,dateVar,stringVar) TF = ismissing(A) 以下说法不正确的是