[6372] in s-news-athena
Names Error
daemon@ATHENA.MIT.EDU (Fred Wolfe)
Fri Feb 3 00:48:59 1995
Date: Thu, 2 Feb 1995 22:12:35 -0500
From: "Fred Wolfe" <WOLFE@TWSUVM.UC.TWSU.EDU>
To: S-news@utstat.toronto.edu
I am performing logistic regression. The analysis continues as below
until, running anova on the step object, knee.lr.step, I get an error:
Error in names<-: Invalid length for names attribute: wz=c(0.25, ..)
Dumped
I don't understand this error. Can anyone help?
> knee.lr_glm(BACKPNLR~SEX+SLEEPSCA+DEPINDEX+WDI+BMI+AGE+WPAINSCA+FATIGUE+
MARRIED+GRADUATE+AMSTIFF+SEVERITY+TOTALINC+OAHIP,
family=binomial(link=logit),na.action=na.omit)
> knee.lr.step _ step(knee.lr) Start: AIC= 476.0454
BACKPNLR ~ SEX + SLEEPSCA + DEPINDEX + WDI + BMI + AGE + WPAINSCA
+ FATIGUE + MARRIED + GRADUATE + AMSTIFF + SEVERITY + TOTALINC +
OAHIP
scale: 1
Df Sum of Sq RSS Cp
<none> 364.1701 394.1701
SEX 1 2.719451 366.8896 394.8896
SLEEPSCA 1 0.401961 364.5721 392.5721
DEPINDEX 1 1.277280 365.4474 393.4474
WDI 1 1.485387 365.6555 393.6555
BMI 1 1.742364 365.9125 393.9125
AGE 1 0.677170 364.8473 392.8473
WPAINSCA 1 1.237584 365.4077 393.4077
FATIGUE 1 1.228993 365.3991 393.3991
MARRIED 1 1.186808 365.3569 393.3569
GRADUATE 1 0.817988 364.9881 392.9881
AMSTIFF 1 1.631246 365.8014 393.8014
SEVERITY 1 1.656217 365.8264 393.8264
TOTALINC 1 0.030099 364.2002 392.2002
OAHIP 1 0.000370 364.1705 392.1705
(deleted) ....
scale: 1
Df Sum of Sq RSS Cp
<none> 363.3896 371.3896
WDI 1 4.368117 367.7577 373.7577
FATIGUE 1 5.439922 368.8295 374.8295
SEVERITY 1 6.580268 369.9699 375.9699
> anova(knee.lr.step,test="Chisq")
Error in names<-: Invalid length for names attribute: wz=c(0.25, ..)
Dumped
Thanks ...
Fred Wolfe
Arthritis Research Center
Wichita,KS
