Nothing
options(sd_num_thread=2)
## qgrams
## qgram edge cases
expect_equivalent(qgrams('a' , q=1), as.matrix(c(a=1))) # basic test
expect_equivalent(qgrams('aa', q=1), as.matrix(c(a=2))) # idem
expect_equivalent(qgrams(c('a','a'),q=1), as.matrix(c(a=2))) # count unique n-grams
expect_equivalent(qgrams(c(NA,'a'), q=1), as.matrix(c(a=1))) # skip NA's
expect_equivalent(qgrams(NA,q=1), matrix(0,nrow=1,ncol=0)) # skip all
expect_equivalent(qgrams(c("a","ab"), q=2), as.matrix(table("ab"))) # skip q>nchar
expect_equivalent(qgrams(c("a"),q=2), matrix(0,nrow=1,ncol=0)) # skip all
expect_equivalent(qgrams(c(''),q=0), as.matrix(table(''))) # empty string, q=0
## qgrams
expect_equivalent(qgrams("a",q=1),array(1,dim=c(1,1)))
expect_equivalent(qgrams("a",q=1,useBytes=TRUE),array(1,dim=c(1,1)))
## seq_qgrams
expect_equivalent(
seq_qgrams(1:3,2:4,q=2)
,matrix(c(
1,2,1,0
,2,3,1,1
,3,4,0,1
),nrow=3,byrow=TRUE)
)
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