How to find the max value of a curve on a graph
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
I'm trying to find the max value of my G(T) curve(the parabolic one). Not sure how to het the value and make it show up as a marker on the graph
T = [310:1:450];
v = 1;
V = 10;
dHrxn = -80000;
UA = 3600;
kf0 = 1;
kc0 = 100;
T0 = 400;
ER = 20000;
CpA = 40;
kf = exp(-20000*(1./T-1/400));
kc = 100*exp((80000/1.987)*(1./T-1/400));
x = 1./(v./(V.*kf)+1+(1./kc));
R = 400*(T-310);
R1 = 400*(T-256);
R2 = 400*(T-233.5);
R3 = 400*(T-218.2);
R4 = 400*(T-391);
R5 = 400*(T-328);
R6 = 400*(T-346);
R7 = 400*(T-353.2);
G = x*-dHrxn;
figure
hold all
plot(T,R,T,G,T,R1,T,R2,T,R3,T,R4,T,R5,T,R6,T,R7)
legend('R(T)','G(T)','Ta=250K','Ta=225K','Ta=208K','Ta=400K','Ta=330K','Ta=350K','Ta=358K','Location','NorthWest')
axis([310 450 0 10*10^4])
xlabel('Temperature (K)')
ylabel('G(T) and R(T) (cal/mol)')
title('G(T) and R(T) vs. T')
0 Commenti
Risposte (1)
KSSV
il 12 Nov 2020
If (x,y) are the data points.
[val,idx] = max(y) ;
plot(x,y)
hold on
plot(x(idx),y(idx),'*r')
0 Commenti
Vedere anche
Categorie
Scopri di più su Graph and Network Algorithms in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!