subset - Can't see my error in R code to restrict/prune/trim dataset -

i referred stackoverflow codereview.stackexchange (https://codereview.stackexchange.com/questions/138189/cant-see-my-error-in-r-code-to-restrict-prune-trim-dataset?noredirect=1#comment258197_138189) question.

for past 30 mins i've been staring @ line of code trying figure out why can't restrict data frame within desired boundaries.

so have dataframe 6 columns:

> finke_mxw[100,]     mhw_diff ghgfinke2 ghgeco mlw_diff glgfinke2 glgeco 100     -112        13    125      -53       164    217 >  

and want limit dataframe range values of 1 column mhw_diff, length of data frame columns remains unchanged.

> finke_mxw_minfx<-finke_mxw[finke_mxw$mhw_diff > -254 | finke_mxw$mhw_diff < 257,] > summary(mhw_diff)     min.  1st qu.   median     mean  3rd qu.     max.  -894.000  -35.000    2.000   -2.212   38.000  446.000  > length(finke_mxw$mhw_diff) [1] 1686 > length(finke_mxw_minfx$mhw_diff) [1] 1686 

any ideas? it's small. :/