Error in a code for (Tunnel diode system)

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Mo'ath Al-Hayek 2021-2-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/740812-error-in-a-code-for-tunnel-diode-system

评论： Mo'ath Al-Hayek 2021-2-10

the first script is

function [xtd] = tunnel_diode_system(t,x)
h=@(z) 17.76*z-103.79*z^2+229.62*z^3-226.31*z^4+83.72*z^5;
xtd= [0.5*(-h(x(1))+x(2)); 0.2*(-x(1)-1.5*x(2)+1.2)];
end

The second script is:

clf;
axis([-.4 1.6 -.4 1.6]);
plot (0.882,0,21,'or',0.063,0,758,'ob');
hold on;
button =1;
options=odeset('AbsTol',1e-8,'RelTol',1e-6);
while button==1;
    [xinit(1),xinit(2),button] = ginput(1);
 if button ~= 1 break;end;
 [t,u]=ode45(@tunnel_diode_system,[0 40],xinit,options);
 plot(u(:,1),u(:,2))
 [t,u]=ode45(@tunnel_diode_system,[0 40],xinit,options);
 plot(u(:,1),u(:,2))
end

I get this error when I run the first script:

Not enough input arguments.
Error in tunnel_diode_system (line 4)
xtd= [0.5*(-h(x(1))+x(2)); 0.2*(-x(1)-1.5*x(2)+1.2)];

and I get this error when I run the second script:

Error using plot
Data must be a single matrix Y or a list of pairs X,Y.
Error in Untitled (line 3)
plot (0.882,0,21,'or',0.063,0,758,'ob');

They are both together, any suggestions?

5 个评论
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Walter Roberson 2021-2-10

This is not an official support channel; you should not expect Mathworks to reply.

Mo'ath Al-Hayek 2021-2-10

Thank you, appreciated

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回答（1 个）

darova 2021-2-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/740812-error-in-a-code-for-tunnel-diode-system#answer_620207

Here is the mistake

Use dot instead of comma

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Walter Roberson 2021-2-10

在 MATLAB Online 中打开

clf;
axis([-.4 1.6 -.4 1.6]);
plot (0.882,0,21,'or',0.063,0,758,'ob');
hold on;
options = odeset('AbsTol',1e-8,'RelTol',1e-6);
while true
  [tx, ty, button] = ginput(1);
  if isempty(tx) || isempty(button) || button ~= 1
      break
  end
 xinit = [tx(1), ty(1)];
 [t,u]=ode45(@tunnel_diode_system,[0 40],xinit,options);
 plot(u(:,1),u(:,2))
 [t,u]=ode45(@tunnel_diode_system,[0 40],xinit,options);
 plot(u(:,1),u(:,2))
end