Why NaN appears in part of pd data output?

Asked Feb 21 '18 at 21:05

Active Feb 21 '18 at 21:52

Viewed 47 times

After my data read in, df.head() showes everything OK. But df1 shows some NaN. '1222','1224','1223' are the X variable names. What should I do to get the X values back? Thanks!

input

df = pd.read_excel(r'C:\Users\Data\input.xlsx',sheetname='InputData')
df.head()
df1 = df.ix[:, ['1222','1224','1223','Y']]
df1.head()

output

1222 1224 1223 Y
NaN  NaN  NaN  0.6785
NaN  NaN  NaN  0.6801

edited Feb 21 '18 at 21:06

Paul H

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asked Feb 21 '18 at 21:05

Chen

those columns either don't exist or are labeled with integers instead of strings – Paul H Feb 21 '18 at 21:07
.ix is deprecated, use .loc or .iloc. https://stackoverflow.com/a/46915810/6361531 – Scott Boston Feb 21 '18 at 21:23
Thank you both! I changed .ix to .loc, and use [1222, 1224,1223,'Y'], now it works! – Chen Feb 22 '18 at 19:50

Why NaN appears in part of pd data output?

0 Answers0