Hello,
I have a data frame tot which has many columns and many rows.
I am trying to find all columns that have say a value in any of their
rows that STARTS WITH: "E94"
for example there are columns like this:
> unique(tot$diagnoses_icd9_f41271_0_44)
[1] NA "E9420"
I tried:
s=select(tot,starts_with("E94"))
but this didn't return me anything. Data type in those columns is character.
Thanks
Ana
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