help w code error
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%Euler's Method
p = 1;
t = 0:p:100;
S = zeros(size(t));
S(1) = 1.000; %initial concentration
n = numel(S); %number of y values (S is y in this case)
disp(' Time Reactant Concentration ')
disp(' (sec) (mol/L) ')
disp(' -------------------------------- ')
%loop to solve the eq
for i=1:n-1
f = -0.5 /(2.1+S)
S(i+1) = S(i) + p * f; %eulers formula
fprintf('6.0f%15.3f\n',t(i), S(i))
end
i am receiving an error for the f = -0.5 /(2.1+S) it says "Error using / Matrix dimensions must agree."
6 个评论
madhan ravi
2020-9-16
Why ask a question if you’re so concerned? Why waste others time?
Rik
2020-9-16
i dont want this question posted anymore
Rik
2020-9-16
That is not an answer to the question Madhan posted. You got free help from a stranger on the internet. Why did you decide to remove your question? You could have simply not posted it. Now you are an inconsiderate jerk taking advantage of friendly people. Is that your intent?
%Euler's Method
p = 1;
t = 0:p:100;
S = zeros(size(t));
S(1) = 1.000; %initial concentration
n = numel(S); %number of y values (S is y in this case)
disp(' Time Reactant Concentration ')
disp(' (sec) (mol/L) ')
disp(' -------------------------------- ')
%loop to solve the eq
for i=1:n-1
f = -0.5 /(2.1+S)
S(i+1) = S(i) + p * f; %eulers formula
fprintf('6.0f%15.3f\n',t(i), S(i))
end
i am receiving an error for the f = -0.5 /(2.1+S) it says "Error using / Matrix dimensions must agree."
Rena Berman
2020-10-8
(Answers Dev) Restored edit
Rik
2020-12-14
Why did you edit your question again? I will simply revert your edit again. If you want it removed, contact Mathworks. Unless and until I hear from them to leave your edit, I will be reverting it every time you edit this. Why waste your time trying to see if you're more stubborn than me?
回答（1 个）
James Tursa
2020-9-16
You need to index S:
f = -0.5 /(2.1+S(i));
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