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Help needed: empty plot when plotting for loop

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LB
LB on 17 Sep 2019
Commented: LB on 18 Sep 2019
Hello,
Below is my code. I am trying to plot all values of the for loop but I am getting an empty plot. What am I doing incorrectly?
for i=2:1:1369
a = (V(i+1)-V(i-1))/(2*(t(i+1)-t(i-1)));
A = ((1/2)*Rhoa*Cd*Af*(V(i).^3));
G = (Mv*g*cos(0).*V(i));
I = (1.1*Mv.*a.*V(i));
Pw = (A+G+I)/1000;
end
figure
hold on
i=2:1:1369;
plot(i,Pw);
grid
xlabel('Time (s)')
ylabel('Power, Pw (KW)')
set(h,'linewidth',2)

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Accepted Answer

Walter Roberson
Walter Roberson on 17 Sep 2019
Do not assign to Pw. Instead assign to Pw(i-1)

  2 Comments

LB
LB on 18 Sep 2019
That worked!! Thank you so much!!
LB
LB on 18 Sep 2019
Hi Walter,
After being able to plot the graph based on your response to this question, I realized my for loop is not doing what I want. Would you be able to help with the below question as well?
Thanks

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