MATLAB: How to plot a function with different values

Question

(M)/1+.5*exp(-k*M*t)*(M-2)

this is the funtuion I want to plot with diffrent M values M= [1,3,5]

clear all

M= 1;

k=0.1;

t=[0:24];

SS= (M)/1+.5*exp(-k*M*t)*(M-2);

plot(SS,'r-');

xlabel('Time IN [SEC]');

ylabel('S');

title('S vs Time')

legend('M1');

I only managed to plot it once with M1

how can I plot it it with 3 lines in one plot command ?

Answer 1

You can make M a column vector, then calculate S as a matrix

then if you plot it against t which is a row vector plot should treat each row of S as a separate series

M= [1;3;5];
k=0.1;
t=[0:24];
SS= (M)/1+.5*exp(-k*M*t).*(M-2);
plot(t, SS, '-');
legend(strcat('M', num2str(M)));

another approach would be to plot in a loop and use hold on:

for M = [1,3,5]
    SS = (M)/1+.5*exp(-k*M*t)*(M-2);
    plot(t, SS, '-', 'DisplayName', ['M' num2str(M)]);
    hold on;
end
hold off;
legend show;