Getting mutliple lines into a legend from a for loop that provides different values

7 vues (au cours des 30 derniers jours)
Below is my code, im trying to get each of the lines on the plot onto the legend but am unsure how to go about it? I know i can just type it out manually for each gamma value e.g legend('2\gamma = 0','2\gamma = 1','2\gamma = 3',) but i would like a method that automatically adjusts to any variations i may make to gamma
clear all
for gamma = [0,0.5,1.5]
% Parameters
k = 5; % constant
zeta = 2*gamma; %Damping Coefficient
x_initial = 0.1; %Initial Position
v_initial = 0; %Initial Velocity
dt = 0.0001; % Time Step
t_vector = 0:dt:10; % Time Vector
x(1) = x_initial; %Initial position
v(1) = v_initial; %Initial velocity
%for loop
for n= 1:length(t_vector)-1
xslope = v(n);
x(n+1) = x(n) + xslope*dt;
vslope = -zeta*v(n) -k*x(n);
v(n+1) = v(n) + vslope*dt;
end
%plotting the graph
a = -zeta*(-v) -k*(-x);
plot(t_vector,a)
hold on;
end
title("Damped Simple Oscillator");
xlabel("Time");
ylabel("Amplitude");
lgd = legend(sprintf("2\\gamma = %d", zeta));
title(lgd, "\zeta")
grid on;
hold off;

Réponse acceptée

Voss
Voss le 10 Avr 2022
all_gamma = [0 0.5 1.5];
for gamma = all_gamma
% your code
end
lgd = legend(sprintfc('2\\gamma = %d',2*all_gamma));
  1 commentaire
Adam Lacey
Adam Lacey le 10 Avr 2022
Modifié(e) : Adam Lacey le 10 Avr 2022
This works amazing thank you. Had to change %d to %g to eliminate scientific notation for decimals.

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Plus de réponses (1)

Matt J
Matt J le 10 Avr 2022
lgd = legend('2\gamma='+string(2*[0,0.5,1.5]));
  1 commentaire
Adam Lacey
Adam Lacey le 10 Avr 2022
Thanks thats definitely more succinct than what i had but still requires manually updating for each change in gamma value. Is there an automatic way?

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