The way to get a graph in case of discretized system

Question

Jinsu Kim 2018-10-18

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https://ww2.mathworks.cn/matlabcentral/answers/424779-the-way-to-get-a-graph-in-case-of-discretized-system

评论： Jinsu Kim 2018-10-18

采纳的回答： madhan ravi

在 MATLAB Online 中打开

Hi guys, I want to get a scatter plot (actually I prefer solid line graph) in the discretized time step system.

Simplified situation is below:

% Initial conditions

t = 0 ;

T = 273 ; % [Kelvin]

dt = 0.2 ; % [time step]

% For loop

for i = 1:100
     t = t + dt ;
     T = 0.5 + T ;
end

What I want to get is a graph of T(y-axis) profile over the time, t(x-axis). In addition, is there any way to get updated graph after every each for loop calculation is end? (I want to be new data point is overlaid on an existing graph.)

Thanks for reading :D

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Answer 1

madhan ravi 2018-10-18

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编辑：madhan ravi 2018-10-18

在 MATLAB Online 中打开

I managed to store the values of t and T but the loop plot seems to be frustrating:

t(1) = 0 ;
% T=zeros(1,100);
% dt=T;
T(1) = 273 ; % [Kelvin]
dt = 0.2 ; % [time step]
% For loop
for i = 2:100
     t(i) = t(i-1) + dt ;
     T(i) = 0.5 + T(i-1) ;
end
T
t

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Jinsu Kim 2018-10-18

Got it. Have a good day!

madhan ravi 2018-10-18

编辑：madhan ravi 2018-10-18

you‘re welcome , you too!

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Answer 2

Steven Lord 2018-10-18

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Use an animatedline. You probably want to determine the final limits of your axes and set them ahead of time using axis so the axes doesn't change limits each time you add a point beyond the boundary of the axes.