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Hi, I am tryimg to replicate a report for below duffing equation. a'=-zita.a-(F/2) sin(phi) phi'=-(1/a)(sigma . a-(3/8)gamma . a^3+(F/2)*cos(phi)) report is given belwo https://www.slideshare.net/slideshow/engi5671matcont-69412508/69412508#1 to plot the backbone curve, in the report they have used user function to transfer as below. Omega=1+epsilon . sigma aF=a/│F│ Why I am not able to see the user function into the main menu. If you have removed it from the latest version, any way to do such transformation?...

Hi, I am tryimg to replicate a report for below duffing equation. a'=-zita.a-(F/2) sin(phi) phi'=-(1/a)(sigma . a-(3/8)gamma , a^3+(F/2)*cos(phi)) report is given belwo https://www.slideshare.net/slideshow/engi5671matcont-69412508/69412508#1 to plot the backbone curve, in the report they have used user function to transfer as below. Omega=1+epsilon . sigma aF=a/│F│ Why I am not able to see the user function into the main menu. If you have removed it from the latest version, any way to do such transformation?...

Hi, I am tryimg to replicate a report for below duffing equation. a'=-zitaa-(F/2)sin(phi) phi'=-(1/a)(sigmaa-(3/8)gammaa^3+(F/2)cos(phi)) report is given belwo https://www.slideshare.net/slideshow/engi5671matcont-69412508/69412508#1 to plot the backbone curve, in the report they have used user function to transfer as below. Omega=1+epsilonsigma aF=a/│F│ Why I am not able to see the user function into the main menu. If you have removed it from the latest version, any way to do such transformation?...