hie how do you compute the logrank test using R
    what commands do you use my data looks something like just an example
  
    treatmentgrp strata censoringTime survivalTime censoring act.surv.time
   [1,]             2      2       42.89005     1847.3358          1      42.89005
   [2,]             1      1       74.40379      440.3467          1      74.40379
   [3,]             2      2       35.17913      344.1113          1      35.17913
   [4,]             2      2       55.79590      741.2375          1      55.79590
   [5,]             2      1      384.73976      189.7997          0     189.79968
   [6,]             1      2      112.76215      375.8227          1     112.76215
   [7,]             2      2       20.82441      658.0410          1      20.82441
   [8,]             2      2       30.58497     1537.5776          1      30.58497
   [9,]             2      1      128.48140      306.9908          1     128.48140
  
  l would like to compare the result with SAS
  
  
    
 
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