Firstly, `*` is the multiplication operator in R. Secondly, you'll
need to convert your factors to numerics:
L<-0.559*as.numeric(T.Grade)-0.896*as.numeric(Smoking)+0.92*as.numeric(Sex)-1.338
Cheers,
Jeff.
2010/10/3 笑啸 <dingdongl...@126.com>:
> dear professor:
> I am a doctor of urinary,and I am developing a nomogram of bladder tumor.Now
> I have a problem about this.
> I have got the result like this through analysing the dataset "exp11.sav"
> through multinominal logistic regression by SPSS 17.0.(the Sig. is high,that
> is good ,it is just aexperimental data )
>
> Parameter Estimates
>
> Ya
>
> B
>
> Std. Error
>
> Wald
>
> df
>
> Sig.
>
> Exp(B)
>
> 95% Confidence Interval for Exp(B)
>
> Lower Bound
>
> Upper Bound
>
> 1
>
> Intercept
>
> -1.338
>
> .595
>
> 5.059
>
> 1
>
> .024
>
>
>
>
>
>
>
> T.Grade
>
> .559
>
> .319
>
> 3.076
>
> 1
>
> .079
>
> 1.749
>
> .936
>
> 3.265
>
> Sex
>
> .920
>
> .553
>
> 2.766
>
> 1
>
> .096
>
> 2.511
>
> .849
>
> 7.428
>
> Smoking
>
> -.896
>
> .474
>
> 3.580
>
> 1
>
> .058
>
> .408
>
> .161
>
> 1.033
>
> a. The reference category is: 0.
>
>
> And after that,I want to develop the nomogram through R-Project.
> And
> I load the package "rms"
>
>> T.Grade<-factor(0:3,labels=c("G0", "G1", "G2","G3"))
>> Sex<-factor(0:1,labels=c("F","M"))
>> Smoking<-factor(0:1,labels=c("No","yes"))
>> L<-0.559T.Grade-0.896Smoking+0.92Sex-1.338 # error (错误:
>> 不适用于非函数;error:it is not fit the non-function)
>
> The R-project index that the last program error.
>
> can you tell me where is the mistake.and how to get the correct equation .
>
> thank you for you help!
> And I an sorry about my poor english!
>
>
> truly yours
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
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and provide commented, minimal, self-contained, reproducible code.
