How can I plot two functions in the same graph?
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Íris
le 17 Sep 2014
Commenté : Raul Galdeano Pazos
le 19 Fév 2022
I have to show that the functions f(x)=x/10 and g(x)=cos(x) intersect at least twice the range [-3,3]. Can anybody help me?
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Raul Galdeano Pazos
le 19 Fév 2022
Hi Íris!
In my view, there are two ways of tackling this problem. Firstly, doing this;
%------------------------------------------------------------------------------------------------------------------------------------------------------------
x = -3:0.1:3;
y1 = x/10;
y2 = cos(x);
%Firstly, just plot one single function;
figure(1)
plot(x,y1,"r-","Linewidth",2);
hold on
%Then, plot the rest of the functions;
plot(x,y2,"b-","Linewidth",2);
I think this way of plotting, despite having more lines of code, works too!
I hope this could help you!
R.G.
Réponse acceptée
Mischa Kim
le 17 Sep 2014
Iris, use
x = -3:0.1:3;
f = x./10;
g = cos(x);
plot(x,f,x,g)
4 commentaires
Shubhashree Bal
le 19 Fév 2018
how can someone plot two graphs with different baseline on single graph plot?
rockstar49
le 25 Oct 2020
Using this way to plot multiple functions, how can you use the legend on function to differenitate between each line?
Plus de réponses (3)
Aayushii Goswami
le 21 Oct 2017
I have to sketch the graph of y^2=8x and x^2=8y on the same axis system and shade the bounded area.can anyone pls help me?
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Realeboha Ramoeletsi
le 9 Juil 2021
t=linspace(0.2,50,100);
alpha=0.5;
c1=2;
r=0.2;
sigma=0.25;
Nt=1600;
Ns=160;
Smax=20;
Smin=0;
T=1.;
E=10;
dt=(T/Nt);
ds=(Smax-Smin)/Ns;
V(1:Ns+1,1:Nt+1)=0.0;
S=Smin+(0:Ns)*ds;
tau=(0:Nt)*dt;
V(1:Ns+1,1)=max(S-E,0);
V(1,1:Nt+1)=0;
V(Ns+1,1:Nt+1)=Smax-E*exp(-r*tau);
y1=C(t,alpha,c1);
figure(1)
plot (S,V(:,1),'r-',S,V(:,round(Nt/2)),'g-',S,V(:,Nt+1),'b-');
plot(t,y1,'-r')
xlabel('S')
ylabel('V(S,tau)')
for j=1:Nt
for n=2:Ns
V(n,j+1)=0.5*dt*(sigma*sigma*n*n-r*n)*V(n-1,j)+(1-dt*(sigma*sigma*n*n+r))*V(n,j)+0.5*dt*(sigma*sigma*n*n+r*n)*V(n+1,j);
end
end
function y=C(t,alpha,c1)
if ~all(t>0)
error(" t values must be positive")
end
if alpha<0 || alpha>1
error("alpha must be in the range (0,1) excluding both ends")
end
y=c1*t.^(alpha-1)./gamma(alpha);
end
i have two functions y and V and i did plot them separately one on its plot, so i am having a problem on ploting the same fuctions in one figure, can someone help me please. thank you.
i have attached .m file
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