python - Conditional creation of a Pandas Dataframe Column -


i'm trying use np.where filter column speed , condition met assign value in column 'c'. reason i'm assigning true. seems work fine person so question i'm little stumped. appreciated.

df["c"] = np.where(df.speed > 3, 'true','false')

   speed   c   0  3.34    true   1  0.02    true   2  0.01    true   3  8.41    true   4  0.03    true

your variables speed aren't integers, test failing. possible objects. if dataframe initialized integers, works expected.

for example, can output have here if make of datatypes of speed column strings.


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