Why is my plot plotting blank?

Why I keep getting blank for my graph? I figured out that if I change plot(i,P_t(i+1)) to plot(i,P_t(i+1),'.');hold on, it will work. But only I want is a smooth line printed.

Answer 1

[Timo Dietz]

Each loop you are plotting one point, only. So you either have to "hold on" the figure to prevent erasing all data before the next point to plot (this would give you some kind of scatter plot) or you have to plot the array at the end of the function.

So to get a line the last row in the function should look like

plot([1:Year+1], P_t)

You got the point?

[Jan]

Hint: 1:Year+1 is a vector already. There is no reason to include it in the Matlab operator for concatenation [ ] .

[Shuqing Qi]

Thank you so much! I got it!

[Timo Dietz]

Glad that I could help you. Please accept the answer to close the topic.