Keep getting and error and I don't know why

So while coding i keep getting this error "Unable to perform assignment because the left and right sides

have a different number of elements." i dont understand why i am getting it. can anyone explain to me why.

close all
clear all
clc

P_h=101325;
T_hin=500;
UA=130;
T_cin=300;
P_c=80*101325;
m_doth=0.08;
m_dotc=0.02;
data_co2=xlsread('CO_2 Thermal Properties');
T_co2=transpose(data_co2(:,1));
cp_co2=transpose(data_co2(:,9))*10^3;
mu_co2=transpose(data_co2(:,12));
data_O2=xlsread('O2 Thermal Properties');
data_N2=xlsread('N2 Thermal Properties');
T_n2=transpose(data_N2(:,1));
cp_n2=transpose(data_N2(:,9))*10^3;
mu_n2=transpose(data_N2(:,12));
T_o2=transpose(data_O2(:,1));
cp_o2=transpose(data_O2(:,9))*10^3;
mu_o2=transpose(data_O2(:,12));
i_o2=transpose(data_O2(:,6));
i_n2=transpose(data_N2(:,6));
i_co2=transpose(data_co2(:,6));
T_air=T_o2;
cp_air=cp_o2.*0.2+cp_n2.*0.8;
i_air=i_o2.*0.2+i_n2.*0.;


N=50;
delx=(1/(N-1));
for i=1:N
    x_bar(i)=(i-1)*delx;
end
T_cout=450;
T_c(1)=T_cout;
T_h(1)=T_hin;
% error = 0.1;
% T_c(N)=T_cin;
% if error > abs(T_c(N)-T_cin)
% T_cout=T_cout-0.1;
for i=1:N-1
    clear z j
    z=find(round(T_c(i),1) == T_co2);
    j=find(round(T_h(i),1) == T_air);
    C_dotc(i)=(cp_co2(z)).*m_dotc;
    C_doth(i)=(cp_air(j)).*m_doth;
    T_c(i+1)=T_c(i)-UA*(T_h(i)-T_c(i))*delx/C_dotc(i);
    T_h(i+1)=T_h(i)-UA*(T_h(i)-T_c(i))*delx/C_doth(i);
end


figure(1)
plot(T_co2,cp_co2,T_air,cp_air)
xlabel('Temp [K]')
ylabel('cp')
title('Temp vs cp')
figure(2)
plot(x_bar,T_c, x_bar,T_h)
xlabel('dimensionless postion')
ylabel('Temp [K]')
title('dimensionless position vs Temp')

Answer 1

[Dylan Bull]

It has to do with me not putting the values above or below the values which are returned. it was a hard thing to find when it doesnt work the way you want it to

Answer 2

[Image Analyst]

You forgot to attach your workbooks so we can't run your code.

Usually (always) this error means that you're trying to stuff a whole multi-element array into a single element of another array.

Like you can't do this

v = [1,2,3,4]; % A 4-element array.
% Try to reassign the value of the first element.
v(1) = rand(100, 1); % Trying to put 100 elements into a space designed for only 1 scalar.

Unable to perform assignment because the left and right sides have a different number of elements.

[Dylan Bull]

It has to do with me not putting the values above or below the values which are returned. it was a hard thiong to find when it doesnt work the way you want it to.

[Image Analyst]

OK. Do you still need our help?

[Dylan Bull]

No, I appreciate it.