Plot Population growth function with different values of b using for loop

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Saira 2023-2-1

评论： Saira 2023-2-2

I need to plot population growth model with different values of b

where b>d

and b=d

using for loops. Both results should be visible on the same graph with different colors.

Here is my function and intial value, but I am not getting how to get the plot .

H=@(t,N)[b*N-d*N];

[T,Y]=ode45(H,[0:1:time],[N0]);

Intitial value

b= 0.1 0.001

d=0.001

N0=400

I need two line for each b on the same plot.

Torsten 2023-2-2

f = @(t,b,d,N0) N0*exp((b-d)*t);

t = 0:0.1:10;

N0 = 400;

b = [0.1 0.001].';

d = 0.001;

plot(t,f(t,b,d,N0))

grid on

Torsten 2023-2-2

Maybe 400 looks like 0 in the loop plot because the second plot gives such large results for N.

Look at the plot from my code above. The red line looks like 0 because the blue line gets up to about 7e19, but is 400.

Saira 2023-2-2

Thank you so much.

I have just started coding so don't know these subtle changes.

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