I dont understand this error

e =rand(1,100);
T = rand(1,100);

[A,B] = pair(e,T);
plot(A(1),A(2))
plot(B(1),B(2))

function [A,B] = pair(C,D)

if (C > 0.3) & (D < 0.3)
    A = [C,D];
else
    B = [C,D];
end 
end

I dont understand this error

Output argument "A" (and maybe others) not assigned during call to "pairwise".

matlab

Answer 1

[Image Analyst]

You need to assign BOTH A and B, not just one of them. You only went into the else block and so you only assigned B, not A. So you can do

function [A,B] = pair(C,D)
A = 0; % or null []
B = 0;
if (C > 0.3) & (D < 0.3)
    A = [C,D];
else
    B = [C,D];
end 

or just have one output

function result = pair(C,D)
if (C > 0.3) & (D < 0.3)
    result = [C,D];
else
    result = [C,D];
end 

[Image Analyst]

Also, your error mentioned pairwise, which you didn't give. You only gave us the pair() function, not pairwise(), but essentially the concept/fix would be the same. You always have to assign all output variables (unless you do special tricks).