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help - hoslem.test

PIKAL Petr 
Hi

thanks for data.

na.exclude does not excludes NA values. Actually it computes result without considering NAs but keeps those NA values in propper positions so that the result has the same length as input

Instead of several ifelse you can use

q131 <- as.numeric(cut(id3$q13,c(0,1.5,5)))-1

fitted values start with NA values
1241         1242         1243         1244         1245         1246
          NA           NA 2.143345e-11 2.143345e-11 2.143345e-11 2.143345e-11
        1247         1248         1256         1268
2.143345e-11 2.143345e-11 2.143345e-11 2.143345e-11

which obviously hoslem.test is not adapted to.
you can use glm without na.action and your fitted values will be without NA.
1243         1244         1245         1246         1247         1248
2.143345e-11 2.143345e-11 2.143345e-11 2.143345e-11 2.143345e-11 2.143345e-11
        1256         1268
2.143345e-11 2.143345e-11

however
tp1$q131 does not exist
NULL
So again, test throws error.

Maybe you wanted
Hosmer and Lemeshow goodness of fit (GOF) test

data:  na.omit(id3$q131), fitted(tp1)
X-squared = NaN, df = 8, p-value = NA

Warning message:
In Ops.factor(1, y) : ?-? not meaningful for factors

However q131 is factor (actually you changed it to factor)

If I change it to numeric
Hosmer and Lemeshow goodness of fit (GOF) test

data:  na.omit(id3$q131), fitted(tp1)
X-squared = NaN, df = 8, p-value = NA

hoslem test works - at least it does not throw errors.

So best way for you would be to understand basic differences in object types (numeric, factor, ....) by reading R intro and think about what hoslem test needs as an input.

Cheers
Petr
<snip>
Instead of several ifelse you can use

q131 <- as.numeric(cut(id3$q13,c(0,1.5,5)))-1
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PIKAL Petr help - hoslem.test May 4 Luciane Maria Pilotto help - hoslem.test May 5