Matlab - Signo positivo

clear

clc

A=[

1.0159e-06 -1.2548e-07 1.7828e-07

-1.2548e-07 1.9885e-06 -1.4045e-06

1.7828e-07 -1.4045e-06 2.9955e-06];

[f,c]=size(A);

for i=1:f

    for j=1:c

        if A(i,j)>0

           M{i,j}=sprintf('+%8.5e\t',A(i,j));

        else

           M{i,j}=sprintf('%8.5e\t',A(i,j));

        end

    end

end

 N=cell2mat(M)

>> signos

N =

+1.01590e-06	-1.25480e-07	+1.78280e-07

-1.25480e-07	+1.98850e-06	-1.40450e-06

+1.78280e-07	-1.40450e-06	+2.99550e-06