Error in cont_lc (line 23) [xlc,vlc,slc,hlc,flc] =
cont(@limitcycle,x0,v0,opt);
I am continuing from a Hopf point in order to obtain limit cycles. But at some of the Hopf Points, the above message is displayed. I do not undertand the error.
Also, at some Hopf points it says step size too small and stops computing limit cycles. I would like to compute more limit cycles. I have tried increasing stepsize and decreasing tolerances, but the message persists.
I am working with Cl_matcont5p4.
Please advice.
Thank you!
Last edit: vr98 2019-12-10
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The very first line states "Neutral saddle". This means you have real eigenvalues of the form +a and -a, so that their sum is zero, just as for a purely imaginary pair. The testfunction for a Hopf checks if the sum of two eigenvalues is zero.
So then it is not a Hopf point and you simply cannot start it.
From: vr98 vr98@users.sourceforge.net
Sent: Tuesday, December 10, 2019 6:20 AM
To: [matcont:discussion]
Subject: [matcont:discussion] Error while continuing from Hopf points.
Neutral saddle
Error using cont>ParseCommandLine (line> 715)
error in parameters, see help
Error in cont_lc (line 23) [xlc,vlc,slc,hlc,flc] =
cont(@limitcycle,x0,v0,opt);
I am continuing from a Hopf point in order to obtain limit cycles. But at some of the Hopf Points, the above message is displayed. I do not undertand the error.
Also, at some Hopf points it says step size too small and stops computing limit cycles. I would like to compute more limit cycles. I have tried increasing stepsize and decreasing tolerances, but the message persists.
I am continuing from a Hopf point in order to obtain limit cycles. But at some of the Hopf Points, the above message is displayed. I do not undertand the error.
Also, at some Hopf points it says step size too small and stops computing limit cycles. I would like to compute more limit cycles. I have tried increasing stepsize and decreasing tolerances, but the message persists.
I am working with Cl_matcont5p4.
Please advice.
Thank you!
Last edit: vr98 2019-12-10
The very first line states "Neutral saddle". This means you have real eigenvalues of the form +a and -a, so that their sum is zero, just as for a purely imaginary pair. The testfunction for a Hopf checks if the sum of two eigenvalues is zero.
So then it is not a Hopf point and you simply cannot start it.
From: vr98 vr98@users.sourceforge.net
Sent: Tuesday, December 10, 2019 6:20 AM
To: [matcont:discussion]
Subject: [matcont:discussion] Error while continuing from Hopf points.
I am continuing from a Hopf point in order to obtain limit cycles. But at some of the Hopf Points, the above message is displayed. I do not undertand the error.
Also, at some Hopf points it says step size too small and stops computing limit cycles. I would like to compute more limit cycles. I have tried increasing stepsize and decreasing tolerances, but the message persists.
Please advice.
Thank you!
Error while continuing from Hopf points.
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