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#matlab

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Antonio Ganfornina Andrades

Hola! Cientifiques de Mastodon, especialmente si usáis Matlab, Mathematica, o Python. Estoy atascado con un problema ¿Podríais echarme un cable?

He obtenido una expresión analítica general que bajo casos puntuales soy capaz de "resolverla a mano", pero en otros casos las integrales no tienen solución analítica.

\int_{-\infty}^{t}dt'e^{\int_{t}^{t'}ds \gamma(s)}e^{-i\omega(t'-t)}

¿Cómo lo implementaríais en un script de integración numérico? Gracias 🫂😊

La integral definida desde menos infinito hasta t con respecto a t' (t prima), de la exponencial de la integral desde t hasta t' (t prima) de una función gamma (dependiente de s) respecto a la variable s, multiplicada por la exponencial de -i*omega*(t' - t).
#matlab#python#mathematica
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simon

This is neat ... I can see what gear the car is in by doing this in Octave ...

clf;hold on;plot(out(:,1),(out(:,3)/1.609344)./out(:,2),'.b-');plot(0,0,'b.')

(1) A function of the current gear ratio, plateaus are simply in gear.

(2) Seconds.

I suspect that the poorly classified section at the end was me reversing into the drive - where the clutch is only partly engaged so that I can go very slowly.

Another graph. By looking at the ratio of the roadspeed and RPM I can see the periods where the car is in a particular gear. That'll be handy for extracting and classifying the shifts ...
#cars#DataScience#matlab
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