Matrix dimensions must agree error

I tried to plot the fitting plot but I ran to this error. Can anyone help me with this please?

clear; close all; clc;
load t2pb2data.mat;
g = g(:);
t = t(:);
plot(t,g,'r*');
xlabel('t [sec]');
ylabel('g');

%Calculate p1 and p2
A = [log(t), ones(size(t))];
z = inv(A'*A)*A'*g;
c1 = z(1);
c2 = z(2);
p1 = c1/(-3);
p2 = -log(c2/sin(0.3*t));

%Display value of p1 and p2 in formarted 
fprintf('p1 = %.4f. \n', p1);
fprintf('p2 = %.4f. \n', p2);

%Calculate R2
gh = p1*log(1./(t.^3))+exp(-p2)*sin(0.3*t);
gb = mean(g);
R2 = 1 - sum((g -gh).^2)/sum((g-gb).^2);

%Display value of R2 in formarted 
fprintf('R2 = %.5f. \n', R2);

%Plot the fitting curve against the experimental data
hold on
tf = linspace(min(t), max(t),100);
gf = p1.*log(1./(tf.^3))+exp(-p2).*sin(0.3.*tf);
plot(tf,gf,'b');
% Add legend
legend('Experimental Data', 'Fitting Curve')

[Adam Danz]

Please provide the entire error message and point to the line producing the error.

[Hong Le]

Matrix dimensions must agree.

Error in Assignment10 (line 32)

gf = p1.*log(1./(tf.^3))+exp(-p2).*sin(0.3.*tf);

[Hong Le]

Here is the picture

Answer 1

[James Tursa]

t and g look like they are vectors, so use element-wise operators (with the . dot) when dealing with equations involving them. E.g., this

p2 = -log(c2/sin(0.3*t));

should probably be this instead

p2 = -log( c2 ./ sin(0.3*t) ); % changed / to ./

and other changes such as

gh = p1*log(1./(t.^3)) + exp(-p2) .* sin(0.3*t); % changed * to .*

[Hong Le]

Thank you a lot for your help. After making the changes I be able to see the result. But the fitting plot is kinda weird.

[Hong Le]

By the way this is the question that I tried to solve