R Selecting only up to maxmimum -


i want calculate mean of acceleration values displacement value of 0.01 max. however, not want include acceleration values after maximum value. how done? 

mean(   subset(s1_intns40_chainno-sheet1,     displacement>0.01:max(displacement),     select=c("acceleration"))$acceleration) [1] -0.8371687

like so: 

limitedavgacc <- mean(data$acceleration[(data$displacement <= max)&(data$displacement >= 0.01)])

this works because bracketed statement create boolean vector, used subset acceleration vector, averaged.


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