How to decrease the interval levels in R -


my data looks 

case        degree       income slab  1          graduate       $1000-$2000  2          high school   $2000- $3000

so on..

for degree category have 4 levels income slab have 20+ levels. these 20+ levels in range of $1000. want decrease 10 or less range of $10000. $1000-$10000, $10000-$20000 on. how can that? appreciated.

try:

ori = c('$1000-$2000','$3000-$4000','$5000-$6000','$7000-$8000','$9000-$10000') > ddf = data.frame(ori) > ddf            ori 1  $1000-$2000 2  $3000-$4000 3  $5000-$6000 4  $7000-$8000 5 $9000-$10000 >  > ddf$ori = gsub('$','',ddf$ori, fixed=t) > ddf          ori 1  1000-2000 2  3000-4000 3  5000-6000 4  7000-8000 5 9000-10000  ddf$min = lapply(strsplit(ori, '-'), function(x)x[1]) > ddf          ori  min 1  1000-2000 1000 2  3000-4000 3000 3  5000-6000 5000 4  7000-8000 7000 5 9000-10000 9000 >  > ddf$new = ifelse(ddf$min<5000, '$1000-$5000', ifelse(ddf$min<10000,'$5000-$10000','$10000-$15000' )) > ddf          ori  min          new 1  1000-2000 1000  $1000-$5000 2  3000-4000 3000  $1000-$5000 3  5000-6000 5000 $5000-$10000 4  7000-8000 7000 $5000-$10000 5 9000-10000 9000 $5000-$10000 >

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