Transforming rows into itemsets in R to use arules

Question

I have the results of survey data in the following format

ResponseID  Reason1  Reason2  Reason3 ... 
1           'Event'  'Tour'   'Other'
2           'Tour'   'Other'
3           'Event'  'Program'

For each survey respondent they selected the reason for their visit to a park.

I would like to run some association rules on the respondent's answers but I can not figure out how to get the data in the appropriate form

I imagine it would look something like

ResponseID  Itemset
1           {'Event','Tour','Other'}
2           {'Tour', 'Other'}
3           {'Event','Program'}

but I have not been able to decipher to documentation of ItemMatrix and R is not a language I am very familiar in - thanks!

Answer 1

Write the dataframe to a file with write.table and then used read.transactions with format = "basket".