[R] Survival model error

[David Winsemius]

You should stop trying to use matrices on the RHS and using separate vectors to Surv. Instead use a data argument and have the names in your formula refer to column names. 

— 
David

Sent from my iPhone

> On Nov 5, 2017, at 7:21 PM, Meghna Govil via R-help <r-help at r-project.org> wrote:
> 
> 
> Hi - Below is my code and then the error when I run the last line. 
> 
> time_np <- train1_na$tte
> event_np <- train1_na$censored
> 
> 
> X_np <- cbind(
>  train1_na$AMT, 
>  train1_na$DISCOUNT_AMT,
>  train1_na$high_price_pcnt,
>  train1_na$EM_RECEIVED,
>  train1_na$DM_RECEIVED,
>  train1_na$TXN_WITH_RINGCODE,
>  train1_na$WEB,
>  train1_na$clearance_pcnt,
>  train1_na$bts_pcnt,
>  train1_na$sales_pcnt,
>  train1_na$holiday_pcnt,
>  train1_na$TXN,
>  train1_na$REDEEMED_REWARDS
> 
>  )
> 
> # Kaplan-Meier non-parametric analysis 
> 
> kmsurvival_np <- survfit(Surv(time_np,event_np) ~ X_np)
> 
> Error in `[.default`(y, who, 1) : (subscript) logical subscript too long
> 
> Any ideas?  
> I have tried several things and still get this error.  
> 
> 
> Thanks,
> Meghna
> 
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