How can I deal with missing data ?

I have Monthly average for wind , But two months(1and 2) it have no data , When making calculations, Nan values show me wrong results.

for example

   month  w_s
1  NaN
2  NaN
3  1.41962
4  2.28722
5  3.86625
6  3.33933
7  1.88889
8  2.13111
9  2.760911
10  2.094844
11  2.90875
12  3.76422

So , Is there any idea to fix this problem ?

Answer 1

[Walter Roberson]

... Do the calculations differently.

It is difficult to be more specific when you have not said what kind of calculation you are doing. Generally speaking, look for nanmean() and nansum() and nanstd()

Answer 2

[Kaushik Lakshminarasimhan]

What kind of calculations are you doing?

For basic operations such as sum, mean, std, max, median etc., you can use the 'nan' variant of those functions: nansum, nanmean, nanstd, nanmax, nanmedian. These variants basically discard ignore nan values when performing calculations.