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I am trying to combine plots to one graph for u, p and a. So i need three separate graphs in total but im having trouble combining the plots needed for each graph.

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i am trying to make three separate graphs for u, p and a against t but im having trouble combining the graphs to make one figure (one for each)
this is my code
mi=2290000;
mf=130000;
tb=165;
t=linspace(0,165);
mr=mi-((mi-mf)*(t/tb));
g = 9.81;
Isp=263;
u=g.*(Isp.*log(mi./mr)-t);
p = cumtrapz(t,u);
hold all
a = gradient(t, u)
hold all
mi2=496200;
mf2=40100;
tb2=360;
t2=linspace(165,360);
mr2=mi2-((mi2-mf2)*(t2/tb2));
hold all
g = 9.81;
Isp=421;
u2=g.*(Isp.*log(mi./mr)-t2);
p2 = cumtrapz(t2,u2);
a2 = gradient(t2, u2)
f1=figure;
plot (t,u, 'red')
hold on
plot (t2,u2, 'red,---')
hold off
f2=figure;
plot(t,p,'blue')
hold on
plot(t2,p2,'blue,---')
hold off
f3=figure;
plot(t,a,'green')
hold on
plot(t2,a2,'green,---')
hold off

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Navya Seelam
Navya Seelam 4 Dec 2019
Hi,
When you are trying to plot u2, try the following
plot (t2,u2, '--r')
Similarly for p2 and a2

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