| group_by_level | R Documentation | 
group by level
group_by_level(x, ...)
## S3 method for class 'character'
group_by_level(x, ...)
## S3 method for class 'factor'
group_by_level(x, ...)
## S3 method for class 'data.table'
group_by_level(x, var, idvar, ...)
| x | named logical/character/factor | 
| ... | S3 dispatch | 
| var | string | 
| idvar | string | 
unnamed character
t1 <- c( KLF5 = 'up',  F11 = 'up', RIG = 'flat',   ABT1 = 'down')
dt <- data.table( gene = c( 'KL5', 'F11', 'RIG',  'ABT1' ), 
                    t1 = c( 'up',  'up',  'flat', 'down' ) )
group_by_level(t1)                #  character
group_by_level(factor(t1))        #     factor
group_by_level(dt, 't1', 'gene')  # data.table
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