can someone help me by solving this error, there are three ode wich i have to solve and plot a single graph of al three equations in one graph.

function dydt=graph(t,y)

dydt = zeros(3,1) ; %column vector

dydt(1) = 1.07*y(1)*y(1)-y(1)*y(1)*y(1)-0.17*y(1)-(0.36*y(1)*y(2))-(0.0001*sqrt(y(1)*y(3))/(1+0.2*sqrt(y(1))));

dydt(2) = y(2)*(0.06*y(1)-4.06*y(2)*y(3)-0.09);

dydt(3) = (0.000089*sqrt(y(1)*y(3)))/(1+0.2*sqrt(y(1)))-0.232*y(2)*y(3)-y(3);

end

y0=[50 100 50];

tspan=[0 100];

[t,y]=ode45(@(t,y) graph(t,y),tspan,y0)

plot(t,y)

[Torsten]

Put the last 4 lines of your code to the top and rerun.

[KALYAN ACHARJYA]

@Torsten Yes sir

[Torsten]

@KALYAN ACHARJYA

Am I too harsh ? :-)

[Rik]

Comment posted as flag by @devyanshi bansal:

can u help me with ploting same for 3-d graph as well

[devyanshi bansal]

can anyone please help with the plotting of 3-d spiral graph of the same equations