differential equation

[Raj Nagaraja]

I would like to do some simulations using differential
equations. Right now, I can do it using exponential
equations [exampleA(t)=A*exp(-alpha*time))]. Could
someone let me know how to do it for the differential
equation (dA/dt=-alpha*A).

Thanks

Raj

 

[dvt]

I would like to do some simulations using differential
equations. Right now, I can do it using exponential
equations [exampleA(t)=A*exp(-alpha*time))]. Could
someone let me know how to do it for the differential
equation (dA/dt=-alpha*A).

I'm pretty sure Excel doesn't solve DEs. You'll need to program it yourself
or buy a math-specific software (Maple, Mathematica, Matlab, ...). But I
can't quite comprehend why you would want to numerically solve the DE when
you already have the analytic solution.

Dave
dvt at psu dot edu

 

[Bernard Liengme]

Far too complex for a newsgroup reply. There is a chapter on this in my book
Might be available in your library
Bernard
www.stfx.ca/people/bliengme

I would like to do some simulations using differential
equations. Right now, I can do it using exponential
equations [exampleA(t)=A*exp(-alpha*time))]. Could
someone let me know how to do it for the differential
equation (dA/dt=-alpha*A).

I'm pretty sure Excel doesn't solve DEs. You'll need to program it yourself
or buy a math-specific software (Maple, Mathematica, Matlab, ...). But I
can't quite comprehend why you would want to numerically solve the DE when
you already have the analytic solution.

Dave
dvt at psu dot edu