Error plotting invalid second data argument

I like to make 2 PLOTS, but I getan error messages. I use the same x-values, a cell array I have made PLOTS with hese values earlier. The problem are caused by the Y values. The PLOTs (called real) gives the error Invalid second data argument. Although i used the same code the Y-values dont look the same. the values TC, TC2 and sf/IR are

if true
  % code
TC = cell2mat(TC);
TC2 = cell2mat(TC2);
SF = cell2mat(SF);
for U = 1:b
temperatuurreal{1,U}(1:TC(1,U),1)=celldata{1,U}(1:TC(1,U),6);
temperatuurreal{1,U}(TC(1,U)+1:TC(1,U)+SF(1,U),1)=celldata{1,U}(TC(1,U)+1:TC(1,U)+SF(1,U),8);
temperatuurreal{1,U}(TC(1,U)+SF(1,U)+1:TC(1,U)+SF(1,U)+TC2(1,U),1)=celldata{1,U}(TC(1,U)+SF(1,U)+1:TC(1,U)+SF(1,U)+TC2(1,U),6);
temperatuurset{1,U}(1:TC(1,U),1)=celldata{1,U}(1:TC(1,U),5);
temperatuurset{1,U}(TC(1,U)+1:TC(1,U)+SF(1,U),1)=celldata{1,U}(TC(1,U)+1:TC(1,U)+SF(1,U),7);
temperatuurset{1,U}(TC(1,U)+SF(1,U)+1:TC(1,U)+SF(1,U)+TC2(1,U),1)=celldata{1,U}(TC(1,U)+SF(1,U)+1:TC(1,U)+SF(1,U)+TC2(1,U),5);
end
laatste=b;
%axis([tMin tMax 0.5 2.2]);
while laatste > 0        
figure('Name','setpoint and real')
%plot(x{1,b}(:,1),temperatuurreal{1,b}(:,1))
hold on
plot(x{1,b}(:,1),temperatuurset{1,b}(:,1))
title('setpointenreal')
xlabel('tijd(s)')
ylabel('temperatuur(C)')
legend(num(1,1:b))
b=b-1;
end
end

[Maria]

Can you provide the variable TC and fix the question so that all the code is in one place?

[Eliah Verbeemen]

I provided an example of TC. SF/IR en TC2 are comparable.

[Maria]

I do not see any .mat attachment. Am I missing something?