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% function generating a design matrix
% c Daniel Nelle 2018
function designMatrix = genDesignMatrix(subjectNo, imgList)
%initialize random number generator
rng('shuffle');
%Factor filter
F1LevA = 1;
F1LevB = 2;
%Factor delay
F2LevA = 0.03;
F2LevB = 0.05;
F2LevC = 0.07;
F1 = [F1LevA, F1LevB];
F2 = [F2LevA, F2LevB, F2LevC];
NREP = length(imgList);
NTRIALS = length(F1) * length(F2) * NREP;
%preallocate an empty design matrix
design = NaN(NTRIALS, 5);
%%
ID = subjectNo;
cnt = 1;
for i = 1:length(F1)
for j = 1:length(F2)
for img = 0:NREP
design(cnt, : ) = [0 ID F1(i) F2(j) img];
cnt=cnt+1;
end
end
end
design = design(randperm(length(design)),:);
design(:,1) = 1:length(design);
designMatrix = design;
% %randomize trial order
% runningOrder = [Shuffle(1:36) Shuffle(37:72)];
%
% runningOrder = [randperm(36) randperm(36)+36];
%
% design = design(runningOrder,:)
% design(:,3) = 1:72
end