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Replace all 0 values to NA
...olumns need to be modified.
to modify only columns 12 to 18 (of the total 21), just do this
df[, 12:18][df[, 12:18] == 0] <- NA
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How can I get the MD5 fingerprint from Java's keytool, not only SHA-1?
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phoxis
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answered Aug 21 '11 at 19:42
Ankit SaxenaAnkit ...
How can I add an empty directory to a Git repository?
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check android application is in foreground or not? [duplicate]
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Having both a Created and Last Updated timestamp columns in MySQL 4.0
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edited Apr 21 '14 at 15:19
kingjeffrey
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Does python have an equivalent to Java Class.forName()?
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edited Nov 5 '15 at 21:42
answered Jan 17 '09 at 8:25
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Read first N lines of a file in python
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