Use a loop (or arrayfun):
result = cell(size(gencostSorted_New, 1), 1);
for row = 1 : size(gencostSorted_New)
result{row} = [gencostSorted_new{row, :}];
end
Or
result = arrayfun(@(row) [gencostSorted_new{row, :}], 1:size(gencostSorted_new), 'UniformOutput', false);
The clever bit is the [gencostSorted_New{row, :}] which concatenate all the cells of a row into a matrix.
