Dear R collegues,
I am new to R and do not understad the warning messages, which appear when I?am trying to apply type III procedure to my glm:
inkm$Gamie glm.inkmZ drop1(glm.inkmZ,test="Ch")
Single term deletions
Model:
InkMb ~ IncStart + Vol + Gamie + PC1 + PC2 + PC3 + SpotsN + PC1:SpotsN
?????????? Df Deviance??? AIC???? LRT?? Pr(Chi)???
????????? 9.3879 27.388?????????????????????
IncStart??? 1? 14.6274 30.627? 5.2395 0.0220791 *?
Vol???????? 1? 15.9723 31.972? 6.5844 0.0102876 *?
Gamie?????? 1? 13.8659 29.866? 4.4780 0.0343330 *?
PC2???????? 1?? 9.6899 25.690? 0.3020 0.5826585???
PC3???????? 1? 10.7326 26.733? 1.3447 0.2462124???
PC1:SpotsN? 1? 21.6517 37.652 12.2638 0.0004618 ***
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Signif. codes:? 0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
Warning messages:
1: In glm.fit(x[, jj, drop = FALSE], y, wt, offset = object$offset,? :
? fitted probabilities numerically 0 or 1 occurred
2: In glm.fit(x[, jj, drop = FALSE], y, wt, offset = object$offset,? :
? fitted probabilities numerically 0 or 1 occurred
Where did PC1 disappiered?? What is the meaning of these warning messages?
Similarly, I do not understand where did PCs dissapeared in the following calculations:
inkm$Gamie glm.inkm0 drop1(glm.inkm0,test="Ch")
Single term deletions
Model:
InkMb ~ IncStart + Vol + Gamie + PC1 + PC2 + PC3 + SpotsN + Gamie:PC1 +
??? Gamie:PC2 + Gamie:PC3
????????? Df Deviance??? AIC??? LRT? Pr(Chi)??
???????? 18.368 40.368??????????????????
IncStart?? 1?? 26.078 46.078 7.7106 0.005490 **
Vol??????? 1?? 26.515 46.515 8.1475 0.004312 **
SpotsN???? 1?? 18.663 38.664 0.2958 0.586537??
Gamie:PC1? 1?? 20.418 40.418 2.0505 0.152155??
Gamie:PC2? 1?? 18.460 38.460 0.0919 0.761818??
Gamie:PC3? 1?? 19.832 39.832 1.4647 0.226180??
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Any suggestions would help me greatly.
Best regards,
Martin