nan Questions
5
Solved
I'm trying to prepare heatmap for my data but I have no idea why this error appears.
My data:
> dput(head(tbl_ready))
structure(c(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.370330677123077,
0, ...
12
Solved
Why do comparisons of NaN values behave differently from all other values?
That is, all comparisons with the operators ==, <=, >=, <, > where one or both values is NaN returns false, contrary...
Benis asked 14/10, 2009 at 9:19
4
I have a massive DataFrame, and I was wondering if there was a short (one or two liner) way to get a count of non-NaN entries in a DataFrame. I don't want to do this one column at a time as I have ...
2
Solved
I am trying to use KNN for imputing categorical variables in python.
In order to do so, a typical way is to one hot encode the variables before. However sklearn OneHotEncoder() doesn't handle NAs s...
Stanfield asked 10/3, 2021 at 11:25
3
I have a dataframe (in Python) as follows:
A B C D E F G H
0 T-1 2 3 - M-7 2 2
1 T-2 5 4 2 M-7 4 3
2 T-3 - - 3 M-7 9 4
3 T-4 6 - 4 M-7 - 9 5
4 T-5 - 1 5 M-7 8 6
I would like to replace th...
7
Solved
I am working with this Pandas DataFrame in Python.
File heat Farheit Temp_Rating
1 YesQ 75 N/A
1 NoR 115 N/A
1 YesA 63 N/A
1 NoT 83 41
1 NoY 100 80
1 YesZ 56 12
2 YesQ 111 N/A
2 NoR 60 N/A...
3
Solved
Kindly accept my apologies if my question has already been answered. I tried to find a solution but all I can find is to dropna solution for all NaN's in a dataframe.
My question is that I have a ...
4
Solved
My application needs to compare Series instances that sometimes contain nans. That causes ordinary comparison using == to fail, since nan != nan:
import numpy as np
from pandas import Series
s1 = ...
Underside asked 26/8, 2013 at 21:37
2
Solved
When I try and unmarshal this JSON object from the Microsoft Web Ngram API:
{"backoff": NaN, "cookie": "", "probabilities": [], "words": []}
I get the error: "invalid character 'N' looking for b...
3
Solved
I do as below
mapper = {'a': 'b', 'c': nan, 'd': 'e', nan : nan}
df['b'] = [ mapper[x] for x in df['a'] ]
df['b'].value_counts()
and
NameError Traceback (most recent call last)
<ipython-inpu...
4
Solved
Note: Similar to Can an integer be NaN in C++?
I understand this has little practical purpose, but can a float or double be set to NaN?
Gemmell asked 14/9, 2011 at 15:50
4
Solved
In my DataFrame, there are columns including values of null and NaN respectively, such as:
df = spark.createDataFrame([(1, float('nan')), (None, 1.0)], ("a", "b"))
df.show()
+----+---+
| a| b|
+...
Multivibrator asked 10/5, 2017 at 2:33
2
Solved
The gnuplot command set datafile missing "nan" tells gnuplot to ignore nan data values in the data file.
How to ignore both nan and -nan? I tried the following in gnuplot, but then the effect of t...
Fungoid asked 10/9, 2013 at 11:44
5
Solved
I need to test if a numeric/float value in PostgreSQL is not a number (NaN). Note that "PostgreSQL treats NaN values as equal". As I'm not seeing any isnan function in PostgreSQL 9.3, her...
Bonaparte asked 16/9, 2014 at 0:17
5
Solved
I am trying to get the highest number from a simple array:
data = [4, 2, 6, 1, 3, 7, 5, 3];
alert(Math.max(data));
I have read that if even one of the values in the array can't be converted to ...
Softball asked 18/9, 2015 at 8:18
4
isnan(), isinf() was not in the spec until C99, is there anyway to implement such a function in C89?
i could use if (d * 0 != 0) to check if d was NaN or Inf, but we always compile our project wit...
Hilbert asked 18/1, 2020 at 3:44
3
Solved
Python version: Python 2.7.13 :: Anaconda custom (64-bit)
Pandas version: pandas 0.20.2
Hello,
I have a quite simple requirement.
I would like to read an excel file and write a specific sheet to ...
2
Solved
I'm trying to generate a new column in a pandas DataFrame that equals values in another pandas DataFrame. When I attempt to create the new column I just get NaNs for the new column values.
First I...
3
Solved
I have a variable x and I want to test if x is set to NaN. How do I do that?
My first instinct is probably to, you know, test it, like this:
if (x === NaN) { ...
Silly rabbit, no, that would be...
Rheumatic asked 18/5, 2015 at 23:35
2
Solved
I want to count the number of occurrences over two columns of a DataFrame :
No Name
1 A
1 A
5 T
9 V
Nan M
5 T
1 A
I expected df[["No", "Name"]].value_counts() to give
No Name ...
13
Solved
How do I remove NaN values from a NumPy array?
[1, 2, NaN, 4, NaN, 8] ⟶ [1, 2, 4, 8]
4
Solved
Is it possible to set a parameter variable with NaN? and have that in a particular module. I want to use it for initialization of some other variables. Therefore, I'll be faced with a run-time erro...
Jaynajayne asked 12/8, 2015 at 17:32
10
Solved
Is there any method to replace values with None in Pandas in Python?
You can use df.replace('pre', 'post') and can replace a value with another, but this can't be done if you want to replace with ...
5
Solved
I have a pandas dataframe (df), and I want to do something like:
newdf = df[(df.var1 == 'a') & (df.var2 == NaN)]
I've tried replacing NaN with np.NaN, or 'NaN' or 'nan' etc, but nothing evalua...
5
I have a dictionary that is filled with data from two files I imported, but some of the data comes out as nan. How do I remove the pieces of data with nan?
My code is:
import matplotlib.pyplot as...
Dorren asked 5/6, 2014 at 19:9
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