Description Usage Arguments Author(s) Examples
phaseportmod
creates a phase portrait (velocity plot, vectorfield) based on the two differential equations that were considered to be the overall best models for indicator 1 and indicator 2. The user may specify entities for which he/she wants to obtain the predicted (modeled) trajectories over the phase portrait. The user may extend the period of time for the modeling to get future-predicted trjectories of the entities based on the models. It calls the function preprocess_data
. It requires the packages plm
, pracma
, deSolve
and graphics
. The function produces graphs by some default settings. For specific requirements the user might want to modify the code according to his/her needs.
1 2 | phaseportmod(dataset, yearnr, xv, yv, rangeX, rangeY, param, f, entidx1,
entidx2, entidx3, entidx4, entidx5, entidx6)
|
dataset |
a |
yearnr |
number of years for which the user wants to produce the phase portrait and obtain the modeled trajectories of the specified entities. |
xv |
a reference to variable from the paneldata to be included as indicator 1 in the modeling procedure. |
yv |
a reference to variable from the paneldata to be included as indicator 2 in the modeling procedure. |
rangeX |
defines the range of the indicator 1. |
rangeY |
defines the range of the indicator 2. |
param |
a vector with parameters from the two models in f. |
f |
a function that contains the models of the two indicators. |
entidx1 |
index of an entity in the wide format data of a variable. |
entidx2 |
index of an entity in the wide format data of a variable. |
entidx3 |
index of an entity in the wide format data of a variable. |
entidx4 |
index of an entity in the wide format data of a variable. |
entidx5 |
index of an entity in the wide format data of a variable. |
entidx6 |
index of an entity in the wide format data of a variable. |
Viktoria Spaiser: viktoria.sp@web.de
1 2 3 4 5 6 | ## Phase Portrait with Model Trajectories over 30 years with the following two models:
## dx/dt = 0.014 + 0.0064*x*y - 0.02*x and dy/dt = 0.106*x^3 - 0.062*y/x
phaseportmod(datap, 30, datap$logGDP, datap$DemocrH, seq(0, 1, by = 0.01), seq(0, 1, by = 0.01),
param <- c(0.014, -0.0064, -0.02, 0.106, -0.062), f <- function(t,Y=c())
rbind(0.014 + 0.0064*Y[1]*Y[2] - 0.02*Y[1], 0.106*Y[1]^3 - 0.062*(Y[2]/Y[1])), 1, 2, 4, 5, 7, 9)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.