MATLAB: How can i randomly sample from a matrix and determine the remaining part

matrixrandom

i have a matrix (D) having 343 rows and 7 columns and i want to sample randomly the 30% of the data and determine the remaining 70% (no randomly). I wrote this code for randomly sample the 30% but i don't know how determine the rest.
perc =30; %percentual
n = round(343*perc/100); % number of rows associated to 30% of data 
c=randperm(length(D),n); 
D1=D(c,:) %output matrix

Best Answer

D2=D(setdiff(1:end,c),:)
or
b = ~logical(accumarray(c(:),1,[size(D,1) 1]));
D2 = D(b,:);
or
b = true([size(D,1) 1]);
b(c) = false;
D2 = D(b,:);
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