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ropensci
?! doesn't work
Trying to code a custom scheme (diabetes complication severity) - trying to use ?! as not followed by - the visualise command recognises this correctly but then I get an error when trying to run - any ideas?
Classification based on: icd10 Error in grepl(paste(cc[[attr(cc, "regexpr")]], collapse = "|"), codified$code) : invalid regular expression '^(E08(31|32|33|36|37|38|39)|E09(31|32|33|36|37|38|39)|E10(31|32|33|36|37|38|39)|E11(31|32|33|36|37|38|39)|E13(31|32|33|36|37|38|39))|^(H350)|^(H3535)|^(H35(6|8|9))|^(H33)|^(E08(34|35)|E09(34|35)|E10(34|35)|E11(34|35)|E13(34|35))|^(H54)|^(H431)|^(E08(21|22|29)|E09(21|22|29)|E10(21|22|29)|E11(21|22|29)|E13(21|22|29))|^(N00)|^(N04)|^(N03)|^(N05)|^(N18(1|2|3|9))|^(N18(4|5|6))|^(N19)|^(E08(4)|E09(4)|E10(4)|E11(4)|E13(4))|^(G90(09|8|9)|G99)|^(G56)|^(G57)|^(G609)|^(G733)|^(G9001)|^(H49)|^(I951)|^(K3184)|^(K591)|^(N319)|^(M316)|^(S04)|^(G45)|^(I6(1|3|5|6)|I6781)|^(I2(4|0|5(?!2)))', reason 'Invalid regexp' In addition: Warning message: In grepl(paste(cc[[attr(cc, "regexpr")]], collapse = "|"), codified$code) : TRE pattern compilation error 'Invalid regexp'
looks like this is a wider problem - R regex doesn't do lookaheads - could add an option to turn on perl? Workaround for now is to filter out any excluded codes before running CodeR.
Thank you very much for your report! You are right that perl is turned off (as stated in the details section of ?classcodes).
This is unfortunate! I remember that this was not true initially and that many of the included regex:s included \\d and \\w etc. For some reasons this didn't work. I remember that I did try to fix this but didn't succed. Unfortenately, I did not document this. In the end, I just decided to turn off perl as a quick and dirty solution which worked. I am currently on parental leave with limited possibilities to investigate this further. But please feel free to submit a pull request if you would have the time!
