Hi all,

I have a big .csv file (21Mb with 1000000 rows) it has this shape:
x
1 NaN
2 NaN
3 0.23

and so on.....

So the first column has x as a header then row number, the second column
contains values between -1,1 and NaN for empty values.

What should I need to do is: create a new .csv file from this one excluding
NaN values and plot a line graph using the new .csv file.

Or can I use the old .csv file to plot a graph excluding NaN values.

Thanks in advance for any help or suggestions.

Regards,
 Vahe

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