Erreur de package MarkovChain

Question

J'ai un problème avec la création d'un modèle Markov en utilisant la bibliothèque 'markovchain'. Pour créer un tracé markovchain, vous devez disposer d'une matrice de transition. Comme vous le voyez les lignes résume à 1.

> rowSums(trans_matrix) 
      (start)  (conversion)   (null) GenericPaidSearch  OrganicSearch   Direct  Affiliates BrandedPaidSearch NewsletterEmail   Social   Referral  Marketplaces  OtherEmail 
       1     1     1     1     1     1     1     1     1     1     1     1     1 
      Display 
       1 
> trans_matrix 
        (start) (conversion) (null) GenericPaidSearch OrganicSearch Direct Affiliates BrandedPaidSearch NewsletterEmail  Social  Referral Marketplaces OtherEmail  Display 
(start)     0 0.000000000 0.0000000  0.37693185 0.15836078 0.1617304 0.061413732  0.093944768  0.080808209 0.0166455536 0.0235115277 0.0126805169 0.0061692425 0.007803395 
(conversion)   0 1.000000000 0.0000000  0.00000000 0.00000000 0.0000000 0.000000000  0.000000000  0.000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.000000000 
(null)     0 0.000000000 1.0000000  0.00000000 0.00000000 0.0000000 0.000000000  0.000000000  0.000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000 0.000000000 
GenericPaidSearch  0 0.026518121 0.2476859  0.00000000 0.22858954 0.2588602 0.096999616  0.068680265  0.020547374 0.0026017779 0.0095898864 0.0037192081 0.0109908437 0.025217232 
OrganicSearch   0 0.020783463 0.1832775  0.30980878 0.00000000 0.2380805 0.118139063  0.050747698  0.017741981 0.0021966262 0.0219099383 0.0094060661 0.0102509223 0.017657495 
Direct     0 0.024502434 0.4800258  0.17849728 0.05675473 0.0000000 0.055662944  0.075476088  0.085230527 0.0057094788 0.0139604811 0.0020761741 0.0129939863 0.009110109 
Affiliates    0 0.024389032 0.4040831  0.17484602 0.13595271 0.1892509 0.000000000  0.020216571  0.012418041 0.0021359030 0.0108285317 0.0090403338 0.0049175442 0.011921319 
BrandedPaidSearch  0 0.022660202 0.2972702  0.13880691 0.12083685 0.2903668 0.071722175  0.000000000  0.030143339 0.0002107926 0.0076412310 0.0000000000 0.0100126475 0.010328836 
NewsletterEmail   0 0.006875955 0.3729685  0.09029032 0.02312821 0.4032505 0.015140992  0.048478955  0.000000000 0.0005556327 0.0112515627 0.0029865259 0.0109042923 0.014168635 
Social     0 0.005744375 0.3834371  0.11967449 0.02058401 0.3011010 0.019147918  0.022020105  0.049305888 0.0000000000 0.0000000000 0.0004786979 0.0004786979 0.078027764 
Referral    0 0.013950399 0.3492028  0.10518158 0.06753764 0.2843224 0.084145261  0.027015058  0.058237378 0.0004428698 0.0000000000 0.0002214349 0.0097431355 0.000000000 
Marketplaces   0 0.009984235 0.3657383  0.13977930 0.09353652 0.2548607 0.074093537  0.002101944  0.001050972 0.0005254861 0.0000000000 0.0000000000 0.0026274304 0.055701524 
OtherEmail    0 0.005845817 0.4607234  0.06868834 0.02922908 0.3704786 0.002922908  0.020460358  0.041286080 0.0000000000 0.0003653635 0.0000000000 0.0000000000 0.000000000 
Display     0 0.004073808 0.5837527  0.14306254 0.03882099 0.1418644 0.003594536  0.021567218  0.022046489 0.0393002636 0.0002396358 0.0004792715 0.0011981788 0.000000000 

cependant, lorsque je tente de faire de la Chaîne de Markov, je reçois cette erreur:

> trans_matrix12 <- new("markovchain", transitionMatrix = trans_matrix) 
Error in validObject(.Object) : 
    invalid class “markovchain” object: Error! Row sums not equal to one 

qui peut me aider?

Answer 1

Il y avait un isse dans le paquet markovchain en raison de la tolérance numérique lors de la création d'une markovchain. Je l'ai poussé un patch sur la version de développement hébergé dans github ... Vous pouvez le télécharger par:

devtools::install_github('spedygiorgio/markovchain')