Wrote

Franceso,
What I understand, this particular project is Isoda Blueberries
It can't be sanity check via one of the most, if not the most reputed Mathcad/Mathsoft.
Not even from native original Smath ... any lab data set to sanity the plots ?
We are not in phase in this project, sorry ... Cheers ... Jean gone.

Jean, all your advice are extremely useful, I'm just exploring different ways to face this problem.

The reason for which now I'm trying the lsoda is because these are stiff equations, so theoretically lsoda should be a good way to face them.

It might be there for me a possibility to check the result, but I have to wait a bit.

For sure make all working properly will be not easy...I tried to add the microbial growth, that is related with respiration, and everything crash badly

I don't give up easily, thank to you, Viacheslav and Alvaro, I have many different ways to reach a solution, I just have to find the square.

lol

Wrote

Jean, all your advice are extremely useful, I'm just exploring different ways to face this problem.
The reason for which now I'm trying the lsoda is because these are stiff equations, so theoretically lsoda should be a good way to face them

Fine, but native Smath ODE has all those specific solvers.
The Mathcad/Mathsoft is a very advanced ODE wrapper, all suitable to optimize
a multi-system. Revisit the early AminoHippuric, read the note ...
Dr. Wschrabi challenged Mathcad Collaboratory. In less than two days he had
1/1 his INUsoft magic solver. To me, ISODA is same topo.
1. Lab data sets ... 2. The system D(t,Y) in vector.
Each data set may each have a model function easy to fit.
Cheers ... Jean ½ gone

You can report about problem with lsoda plugin here. Please attach an example that reproduces the problem with your message. You also need to specify the version of the program and the version of the plugin.

But as I can see, this is an issue related to visualisation with the X-Y Plot plugin. I wonder what data led to his fall.

Wrote

Wrote

Jean, all your advice are extremely useful, I'm just exploring different ways to face this problem.
The reason for which now I'm trying the lsoda is because these are stiff equations, so theoretically lsoda should be a good way to face them

Fine, but native Smath ODE has all those specific solvers.
The Mathcad/Mathsoft is a very advanced ODE wrapper, all suitable to optimize
a multi-system. Revisit the early AminoHippuric, read the note ...
Dr. Wschrabi challenged Mathcad Collaboratory. In less than two days he had
1/1 his INUsoft magic solver. To me, ISODA is same topo.
1. Lab data sets ... 2. The system D(t,Y) in vector.
Each data set may each have a model function easy to fit.
Cheers ... Jean ½ gone

Jean, Thank you again a lot for all these informations, I really need to study better the note and understand how to use it for my scope, because I have no doubt that the ODE solver has in it all the specific solvers, it is that, for now, I have some difficulty to use it. ehehe But with a little bit of time, I will be able to explore better all the things!

Wrote

You can report about problem with lsoda plugin here. Please attach an example that reproduces the problem with your message. You also need to specify the version of the program and the version of the plugin.

But as I can see, this is an issue related to visualisation with the X-Y Plot plugin. I wonder what data led to his fall.

Viacheslav, yes I found where the problem was, an error in the variable assignations of the ODE related to the microbial growth that went to -infinite and crashed everything, now I have solved it but in any case, I attach the file in the lsoda plugin page, so you can see it.

This is much better

Few comments:
1. Just capture what you need, not the all work sheet.
Freeware WinGrab ... I use for last 20 years.
2. DE's system are universal in vector format. Exhaust the 17 native Smath.
Exceptionally, I found only one that did the project [which one now ?]
3. I'm not arguing about ISODA. However, if you can't have it in
normalized format => recycle bin.
4. Your preamble coefficients open in most glorious mess in my SS 6179.
5. Construct the image ... as you hover the vector, you see the internal expansion.
Often, that is damned useful for export.

BTW, Viacheslav, you are still in the Mathcad Community.
Valery Ochov and Viktor Korobov are Authorities in DE's solving.
Why not share a Vodka and the project between all yous Champions ?
For that particular example, Valery gave his MCD code.
From recollection, all Smath DE's solvers fail except 'mwode113'
Cheers ... Jean

ODE Valery Reaction.sm (18 KiB) downloaded 36 time(s).

Wrote

The problem is in the X-Y Plot plugin. It cannot display the input data because it is outside the normal bounds

@ 0.037 nanometer the diameter of H atom, how many zillions years you will have
to hammer this atom down to X^-25 m in that green plot. That result is wrong from
some input coefficients/construction.

Wrote

Few comments:
1. Just capture what you need, not the all work sheet.
Freeware WinGrab ... I use for last 20 years.
2. DE's system are universal in vector format. Exhaust the 17 native Smath.
Exceptionally, I found only one that did the project [which one now ?]
3. I'm not arguing about ISODA. However, if you can't have it in
normalized format => recycle bin.
4. Your preamble coefficients open in most glorious mess in my SS 6179.
5. Construct the image ... as you hover the vector, you see the internal expansion.
Often, that is damned useful for export.

Jean your observations are all right, especially the 4! I need to be more ordered in all these works, and you haven't seen my papers works! 5 I need to learn how to do that, but export all the output in excel to have better graphs would be lovely.

And I have absolutely to try to make all the system with D(t,U) and gearsBDF!

Wrote

Wrote

The problem is in the X-Y Plot plugin. It cannot display the input data because it is outside the normal bounds

@ 0.037 nanometer the diameter of H atom, how many zillions years you will have
to hammer this atom down to X^-25 m in that green plot. That result is wrong from
some input coefficients/construction.

:d Today, I swear, I have two things to do, the first is to read a little on how to rewrite all the mess in a more elegant way, and try a different approach...the second is to put a little bit of order and coherence in the data, so all in IS and real.

Wrote

Today, I swear, I have two things to do, the first is to read a little on how to rewrite all the mess in a more elegant way, and try a different approach...the second is to put a little bit of order and coherence in the data, so all in IS and real.

For my own curiosity, is ISODA a freeware software, stand alone Win.7 ?
Obviously with examples that all others failed.

For my own curiosity, is ISODA a freeware software, stand alone Win.7 ?
Obviously with examples that all others failed.

Oh I really don't know about this.

I had tried to use the D(t,U) thing but there is something that isn't clear.

How do you tell to the second two that have to keep ro2-rco2 from the first two? (ok, problem solved: I'm stupid like a piece of wood for asking this )

Yap...Sorry Jean, but for now I'm totally unable to follow this pathway, I need to study better all the thing because really don't work for me now. bdf.sm (32 KiB) downloaded 26 time(s).


With the lsoda pathway, I'm at (theoretically) a good point, I need to correlate the change in humidity, add the heat and (maybe) it will work.

You seem to fabricate ... show the vector DE's from source,
so we can exhaust Smath native DE's solvers plus more from the brew.
That 'bdf' vector, is that what you plug in ISODA ? magic plot
w/o data sets, you are @ square 1 [rather square 0].

Wrote

You seem to fabricate ... show the vector DE's from source,
so we can exhaust Smath native DE's solvers plus more from the brew.
That 'bdf' vector, is that what you plug in ISODA ? magic plot
w/o data sets, you are @ square 1 [rather square 0].

lsoda MAP4.sm (63 KiB) downloaded 27 time(s).

In the data is possible that there are yet errors, but for now, this is the best I get from literature

bdf have the same, but I'm sure that I write something wrong there.

Wrote

In the data is possible that there are yet errors, but for now, this is the best I get from literature

1. Attach those data from literature.
2. Data are just data and when it comes to fit in some way(s),
it is immaterial true or not so true.
There are gurus in Smath Community to fit data, mostly model function(s).
3. Clean the top part and re-post this document as you manipulate the vector D(t,U)



That freak, unless multiplied by a damned huge number from blue sky has no meaning.

... the document with additional stuff.

lsoda MAP3.sm (89 KiB) downloaded 27 time(s).

Wrote

... the document with additional stuff.

lsoda MAP3.sm (89 KiB) downloaded 27 time(s).

Jean, sorry for the late reply.

I'm working on something and what you have done in the file is really useful and it gives to me some idea.

Hopefully, I will come up with something definitive really soon.

Wrote

Hopefully, I will come up with something definitive really soon.

"soon" often meant [Jean, please for yesterday !].
Your two first DE's are supposed having some meaning.
Next components must relate to more between themselves ... revisit HIRES.
The weakest link in this project seems the lack of starting inspired techniques
from the brain storming team involved. On my side, can't help inspiring.
My Chemical Engineering is 50 years buried deep, and where was it buried ?
Jean

So, after a while, I'm back.

The work is still in progress, but things start to make sense.

I really don't know if my use of the "grammatic" in the system is correct or if I'm only lucky, but the results on paper are reasonable.

The "big" issue now is to make the "if" work properly, but in a way or another I will fix that problem.

I'm exploring different solutions.

As soon I will have the possibility to validate it I will put here the final work.

The model is something like a spherical horse for sure, a lot of simplifications, but I'm facing really a lot of troubles to obtaining a correct connection in the variables.

Anyway, I'm having a lot of fun.


In progress LSODA.sm (60 KiB) downloaded 29 time(s).