search for: shg

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2012 Feb 13
1
multi-regression with more than 50 independent variables
...1, the coefficients will get ?NA? in the output. Is there any limitation for the number of independent variables in multiple linear regressions in R? I attached my dataset as well as R codes below: mlr.data<- read.table("./multiple.txt",header=T) mlr.output<- lm(formula = CaV ~ SHG + TrD+ CrH+ SPAD+ FlN+ FrN+ YT+ LA+ LDMP+ B+Cu+ Zn+ Mn + Fe+ K + P+ N +Clay30 +Silt30 +Sand30 +Clay60 +Silt60 +Sand60 +ESP30 +NaEx30+ CEC30+Cl30+ SAR30 +KSol30+ NaSol30 +CaMgSol3 +ZnAv30 +FeAv30 +OC30 +PAv30 +KAv30 +TNV30+ pH30+ EC30 +SP30 +ESP60 +NaEx60 +CEC60 +Cl60 +SAR60 +KSol6...
2006 Dec 29
0
What's meaning of the lambda in nlrq output
....767343 converged lambda = 0.004997877 47.76734 : 0.5557633 7.2172873 iter 0 value 47.787967 final value 47.747700 stopped after 3 iterations lambda = 0.1719594 47.7477 : 0.547935 7.165428 iter 0 value 47.799883 final value 47.747700 converged lambda = 0 47.7477 : 0.547935 7.165428 -- Shg SUN @China
2007 Mar 09
2
Extracting the p of F statistics from lm
I need to extract the p value from a ANOVA done with lm model fitting <- lm(var ~ group) Sfitting <- summary(fitting) Sfitting[10][1] gives the F value and the degrees of freedom but I am not able to get the p value. The function df should give a p value given a F but I am not able to make it work. I found only something about aov in the R help and I am not able to make it work Massimo