How can I plot two functions in the same graph?
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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?
댓글 수: 1
Raul Galdeano Pazos
2022년 2월 19일
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.
채택된 답변
Mischa Kim
2014년 9월 17일
Iris, use
x = -3:0.1:3;
f = x./10;
g = cos(x);
plot(x,f,x,g)
댓글 수: 4
Shubhashree Bal
2018년 2월 19일
how can someone plot two graphs with different baseline on single graph plot?
rockstar49
2020년 10월 25일
Using this way to plot multiple functions, how can you use the legend on function to differenitate between each line?
추가 답변 (3개)
Aayushii Goswami
2017년 10월 21일
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
2021년 7월 9일
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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