nan Questions
4
Solved
I have a two-column DataFrame, I want to select the rows with NaN in either column.
I used this method df[ (df['a'] == np.NaN) | (df['b'] == np.NaN) ]
However it returns an empty answer. I don't ...
29
Solved
How do I check whether a pandas DataFrame has NaN values?
I know about pd.isnan but it returns a DataFrame of booleans. I also found this post but it doesn't exactly answer my question either.
5
Solved
I've got a pandas DataFrame that looks like this:
sum
1948 NaN
1949 NaN
1950 5
1951 3
1952 NaN
1953 4
1954 8
1955 NaN
and I would like to cut off the NaNs at the beginning and at the end ONLY (...
Choli asked 20/7, 2015 at 6:55
2
Solved
I have an C++ program. Somewhere in the program (hard to reproduce, but reproduceable) a caclculation results in a float beeing set to a NaN. Since a floating point operation involving a NaN result...
Justajustemilieu asked 22/3, 2011 at 15:54
5
Solved
I have the following code...
if (Price_Foreign != Double.NaN)
{
output.Append(spacer);
output.Append(String.Format("{0,-10:C} USD",Price_Foreign));
}
Which outputs:
NaN USD
What gives?
I'...
3
Solved
I need to export a dataframe from pandas to Microsoft SQL Server using SQL Alchemy. Many columns are strings, with missing values and with some very long integers, e.g. 9999999999999999999999999999...
Williamson asked 16/11, 2017 at 14:57
11
Solved
In R I can quickly see a count of missing data using the summary command, but the equivalent pandas DataFrame method, describe does not report these values.
I gather I can do something like
len(m...
Applaud asked 7/3, 2014 at 18:8
5
Solved
I am trying to write a lambda function in Pandas that checks to see if Col1 is a Nan and if so, uses another column's data. I am having trouble getting code (below) to compile/execute correct...
25
Solved
I have created a Pandas DataFrame
df = DataFrame(index=['A','B','C'], columns=['x','y'])
Now, I would like to assign a value to particular cell, for example to row C and column x. In other words, ...
5
Solved
I just want to check if a single cell in Pandas series is null or not i.e. to check if a value is NaN.
All other answers are for series and arrays, but not for single value.
I have tried pandas....
6
I am working with a df and using numpy to transform data - including setting blanks (or '') to NaN. But when I write the df to csv - the output contains the string 'nan' as oppose to being NULL.
I...
12
Solved
I need to compare two numeric values for equality in Javascript. The values may be NaN as well.
I've come up with this code:
if (val1 == val2 || isNaN(val1) && isNaN(val2)) ...
which is ...
Homologate asked 22/1, 2012 at 22:40
1
Solved
I am currently trying to build a simple console calculator in C++ and was thinking about what to do when the user types 0/0. In my calculator I convert each number from the users input to a double ...
6
Solved
I want to save X (ndarray) with dimensions (3960, 225) in excel file (.xlsx). In X I have some missing values (nan). I made a code for it. However, I am getting the error.
Here is the Code:
workboo...
Lunseth asked 13/12, 2020 at 17:26
6
Solved
I want to create a Pandas DataFrame filled with NaNs. During my research I found an answer:
import pandas as pd
df = pd.DataFrame(index=range(0,4),columns=['A'])
This code results in a DataFram...
12
Solved
Soooooo isNaN is apparently broken in JavaScript, with things like:
isNaN('')
isNaN(' ')
isNaN(true)
isNaN(false)
isNaN([0])
Returning false, when they appear to all be... Not a Number...
In EC...
Gaikwar asked 7/8, 2014 at 7:22
7
Solved
In the context of unit testing some functions, I'm trying to establish the equality of 2 DataFrames using python pandas:
ipdb> expect
1 2
2012-01-01 00:00:00+00:00 NaN 3
2013-05-14 12:00:00+00...
19
Solved
float('nan') represents NaN (not a number). But how do I check for it?
2
Solved
For a time series sales forecasting task I want to create a feature that represents the average sales over the last 3 days. I have a problem when I want to predict the sales for days in the future,...
Garbanzo asked 5/4, 2018 at 16:47
17
I'm writing code to receive an arbitrary object (possibly nested) capable of being converted to JSON.
The default behavior for Python's builtin JSON encoder is to convert NaNs to NaN, e.g. json.dum...
2
Solved
When I do this:
var x = parseInt("–2147483648");
console.log(x);
I get the value as:
NaN
Why does this happen?
I want to test if a number is in the range of C (int), so I am doing the above,...
Dingess asked 24/7, 2013 at 5:21
4
Solved
what is NaN, Object or primitive?
NaN - Not a Number
Higherup asked 8/5, 2012 at 12:21
14
Solved
This is my dataframe:
date ids
0 2011-04-23 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,...
1 2011-04-24 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,...
2 2011-04-25 [0, 1, 2, 3, 4, 5, 6, 7, 8...
2
Solved
I supposed that
data[data.agefm.isnull()]
and
data[data.agefm == numpy.nan]
are equivalent. But no, the first truly returns rows where agefm is NaN, but the second returns an empty DataFrame. I t...
Darryldarryn asked 27/12, 2016 at 9:38
2
Solved
I have a dataframe df that looks like:
0 1 2 3 4 5 6 7 8
0 2014-03-19T12:44:32.695Z 1395233072695 703425 0 2 1 13 5 21
1 2014-03-19T12:44:32.727Z 1395233072727 703425 0 2 1 13 5 21
The columns ar...
Hime asked 26/3, 2014 at 8:51
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