You are here

ModelsForum

Discussion of models, techniques, tips and tricks.

influence arrows and modularity

I'm attempting to combine several submodels, some of which share common parameters. The "help" contents of version 4.2 tell me:

Forums: 

scheduling

I'm using Simile to build an individual based model of a plant monoculture. It's important that I know how my "rules" are scheduled for individuals. Synchronous versus asynchronous scheduling?

Thank you,

Lora Harris

Forums: 

stage based modelling

Hello,

I am new to modelling and simile, and dont have a fantastic
mathematical ability.

I have a population of logs in Decay class 1, and i know that
members move from decay class 1 to 2 between 20 and 50 years, with the mean at 35 years.

How can i capture this pattern around the mean?
can i draw a normal distribution graph of the mean and the variance and incorporate this into the flow out of the decay class 1 compartment?

i can send further info and model if needed

cheers,

LS

Forums: 

Preventing compartments going negative

Owen Buchner at Dalhousie Uni writes:

Forums: 

births in age-class pop. model (beware the beginner!)

Greetings,
I'm a little new to DS modelling and very new to Simile ... in the learning phase.

I have downloaded an example (ageclass6) from the simultics site, to look at age-class based population models. I modified the model a little to suit my need but came up short with the results.

The youngest age-class is to contain the total number of births produced by the population at the end of an iteration. However, these are only stored in the in-flow at this stage and are only added to the youngest age class one iteration later.

Forums: 

Finding differences between two models

While developing a model it is good practice to save versions of the model as you go along. Sometimes, one looses track of the different versions and later want to know exactly the difference between two models.

I have found the equation listing to be very useful for this, combined with general purpose text file difference software, e.g. WinMerge (http://winmerge.sourceforge.net/).

Forums: 

Adding values into array

I need to store values of variables into a matrix or an array while the model is running and calculating these values, in other words I need to have something like
array.addElement(val)
function which will add elements on a fly. What would you suggest?

Forums: 

Spatial Grid Dispaly Issue

I am trying to display 5x5 matrix ([[1,2,3,4,5],[6,7,8,9,10],[11,12,13,14,15],[16,17,18,19,20],[21,22,23,24,25]]) using a spatial grid display helper, when I assign matrix to a spatial grid, it displays one dimensional 25 cells long line with my values there
How can I make it look two dimensional?

Forums: 

Regarding The Double Loop

I was able to implement double loop search for matrix
However, there last problem that I have encountered, circular loop
I load a sample Matrix into my 1st sub which creates a random 3x3 matrix (borders are taken care of) --That Works
I pass 3x3 Matrix to Searching Sub (name: 3x3), which finds the smallest value and gives me Row position, Column position and Value--That Works

Forums: 

Pages

Subscribe to RSS - ModelsForum