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agrep insists on matching millisecond (and not just second)

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I'm trying to get agrep to match seconds to second and not millisecond, but there doesn't seem to be any value of costs to accomplish this.

I am especially confused that there's no value of the cost for deletions/insertions that seems to do the trick -- as I see it, second is one deletion from seconds whereas millisecond is one deletion and 5 insertions.

(warning that the lapply might take a while... you would get the same result for length.out = 10 and 0:10 much quicker)

rng = c(seq(0, 1, length.out = 20), 0:100)
x = expand.grid(insertions = rng, substitutions = rng, deletions = rng)

units = c("millisecond", "second", "minute", "hour", "day",
 "week", "month", "quarter", "year")
x$match = lapply(seq_len(nrow(x)), function(ii)
 agrep('second', units, value = TRUE, costs = x[ii, ]))

x$match_which = sapply(x$match, paste, collapse = '|')

sort(table(x$match_which))
# millisecond|second|minute|hour|week|month|year 
# 57 
# millisecond|second|minute|hour|week|month|quarter|year 
# 13276 
# millisecond|second|month 
# 23316 
# millisecond|second|minute|month|quarter 
# 37842 
# millisecond|second|minute|quarter 
# 251480 
# millisecond|second|minute|hour|day|week|month|quarter|year 
# 409865 
# millisecond|second 
# 1035725 

What am I missing here? Is there no way to accomplish my task (match seconds to second and not millisecond) with agrep?

r agrep

share|improve this question

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I might be off, but does it help to do agrep("^second", ...) to make sure the matched pattern starts with "second"?
  
  – Lennyy
  Mar 27 at 6:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Lennyy could be... but would need fixed = FALSE to do regex matching... still not sure why it wouldn't work with fixed = TRUE
  
  – MichaelChirico
  Mar 27 at 8:40
  

  
  
  
  

add a comment | 

0

I'm trying to get agrep to match seconds to second and not millisecond, but there doesn't seem to be any value of costs to accomplish this.

I am especially confused that there's no value of the cost for deletions/insertions that seems to do the trick -- as I see it, second is one deletion from seconds whereas millisecond is one deletion and 5 insertions.

(warning that the lapply might take a while... you would get the same result for length.out = 10 and 0:10 much quicker)

rng = c(seq(0, 1, length.out = 20), 0:100)
x = expand.grid(insertions = rng, substitutions = rng, deletions = rng)

units = c("millisecond", "second", "minute", "hour", "day",
 "week", "month", "quarter", "year")
x$match = lapply(seq_len(nrow(x)), function(ii)
 agrep('second', units, value = TRUE, costs = x[ii, ]))

x$match_which = sapply(x$match, paste, collapse = '|')

sort(table(x$match_which))
# millisecond|second|minute|hour|week|month|year 
# 57 
# millisecond|second|minute|hour|week|month|quarter|year 
# 13276 
# millisecond|second|month 
# 23316 
# millisecond|second|minute|month|quarter 
# 37842 
# millisecond|second|minute|quarter 
# 251480 
# millisecond|second|minute|hour|day|week|month|quarter|year 
# 409865 
# millisecond|second 
# 1035725 

What am I missing here? Is there no way to accomplish my task (match seconds to second and not millisecond) with agrep?

r agrep

share|improve this question

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I might be off, but does it help to do agrep("^second", ...) to make sure the matched pattern starts with "second"?
  
  – Lennyy
  Mar 27 at 6:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Lennyy could be... but would need fixed = FALSE to do regex matching... still not sure why it wouldn't work with fixed = TRUE
  
  – MichaelChirico
  Mar 27 at 8:40
  

  
  
  
  

add a comment | 

I'm trying to get agrep to match seconds to second and not millisecond, but there doesn't seem to be any value of costs to accomplish this.

I am especially confused that there's no value of the cost for deletions/insertions that seems to do the trick -- as I see it, second is one deletion from seconds whereas millisecond is one deletion and 5 insertions.

(warning that the lapply might take a while... you would get the same result for length.out = 10 and 0:10 much quicker)

rng = c(seq(0, 1, length.out = 20), 0:100)
x = expand.grid(insertions = rng, substitutions = rng, deletions = rng)

units = c("millisecond", "second", "minute", "hour", "day",
 "week", "month", "quarter", "year")
x$match = lapply(seq_len(nrow(x)), function(ii)
 agrep('second', units, value = TRUE, costs = x[ii, ]))

x$match_which = sapply(x$match, paste, collapse = '|')

sort(table(x$match_which))
# millisecond|second|minute|hour|week|month|year 
# 57 
# millisecond|second|minute|hour|week|month|quarter|year 
# 13276 
# millisecond|second|month 
# 23316 
# millisecond|second|minute|month|quarter 
# 37842 
# millisecond|second|minute|quarter 
# 251480 
# millisecond|second|minute|hour|day|week|month|quarter|year 
# 409865 
# millisecond|second 
# 1035725 

What am I missing here? Is there no way to accomplish my task (match seconds to second and not millisecond) with agrep?

r agrep

share|improve this question

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges

rng = c(seq(0, 1, length.out = 20), 0:100)
x = expand.grid(insertions = rng, substitutions = rng, deletions = rng)

units = c("millisecond", "second", "minute", "hour", "day",
 "week", "month", "quarter", "year")
x$match = lapply(seq_len(nrow(x)), function(ii)
 agrep('second', units, value = TRUE, costs = x[ii, ]))

x$match_which = sapply(x$match, paste, collapse = '|')

sort(table(x$match_which))
# millisecond|second|minute|hour|week|month|year 
# 57 
# millisecond|second|minute|hour|week|month|quarter|year 
# 13276 
# millisecond|second|month 
# 23316 
# millisecond|second|minute|month|quarter 
# 37842 
# millisecond|second|minute|quarter 
# 251480 
# millisecond|second|minute|hour|day|week|month|quarter|year 
# 409865 
# millisecond|second 
# 1035725 

share|improve this question

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges

share|improve this question

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges

asked Mar 27 at 6:02

MichaelChiricoMichaelChirico

21.7k88 gold badges6666 silver badges126126 bronze badges