logo
down
shadow

Pandas concat doesn't work as expected when one DF is created using a for loop


Pandas concat doesn't work as expected when one DF is created using a for loop

By : Shakir R
Date : November 22 2020, 04:01 AM
I hope this helps . Problem is you cast columns to strings, sa DataFrame cannot be aligned, because different columns names:
code :
for t in np.arange(10):
    #casting to string 
    samples_2[str(t)] = np.random.choice(datasort,2)

print (sample_1.columns)
RangeIndex(start=0, stop=10, step=1)
print (samples_2.columns)
Index(['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'], dtype='object')
for t in np.arange(10):
    samples_2[t] = np.random.choice(datasort,2)


Share : facebook icon twitter icon
Javascript - concat string does not work as expected

Javascript - concat string does not work as expected


By : demaxman
Date : March 29 2020, 07:55 AM
it fixes the issue What's the wrong with this Javascript line? ,
alert(user + "X") shows only h.reem
onclick of links created using a loop doesnt work

onclick of links created using a loop doesnt work


By : Kiran Kaur
Date : March 29 2020, 07:55 AM
C++ string array & for loop doesnt work as i expected

C++ string array & for loop doesnt work as i expected


By : s7aby.com
Date : March 29 2020, 07:55 AM
will be helpful for those in need You are confused about the character '1' and the number 1. They are different.
Instead of
code :
  if(num[a]==1 || num[a]==3 || num[a]==5 || num[a]==7 || num[a]==9)
  if(num[a]=='1' || num[a]=='3' || num[a]=='5' || num[a]=='7' || num[a]=='9')
char num[10] = {0};
#include <iostream>
using namespace std;

int main()
{
   cout << "Odd or Even"<< endl;
   for(;;)
   {
      char num[10] = {0};
      int a;
      cout << "Enter Number:" ;
      cin >> num;
      cout << endl;
      for(a=9;a>=0;a--)
      {
         if(num[a]!='\0' && num[a]!=' ')
            break;
      }
      cout << num[a] << endl;
      if(num[a]=='1' || num[a]=='3' || num[a]=='5' || num[a]=='7' || num[a]=='9')
         cout << "Odd" << endl;
      else
         cout << "Even" << endl;
   }
}
         if(num[a]!='\0' && num[a]!=' ')
         if(isdigit(num[a]))
Changing array element value from within loop doesnt work as expected

Changing array element value from within loop doesnt work as expected


By : Khanyi
Date : March 29 2020, 07:55 AM
this will help You have several issues. First you are counting array indexes from zero to the number of elements. When that is 4 then you go from 0 - 4, which is 5 elements, so you get an extra one. When it is fewer than 4 then it won't add the 'Unknown' because you are not iterating far enough.
Second, when you print an array using [*] inside quotes, the delimiter between elements is the first character of $IFS, which by default is a space:
code :
print_status()
{
    echo "$1|$2|$3|$4"
    paramArr=("$@")

    for ((i=0; i < 4; i++))
    do
        if [[ -z ${paramArr[i]} ]];
        then
            paramArr[i]="Unknown"
        fi
    done

    oldIFS="$IFS"
    IFS='|'
    echo "${paramArr[*]}"
    IFS="$oldIFS"
}

print_status Running 162.103.172.46 3.345 -0.076
print_status 'Not Running'
Running|162.103.172.46|3.345|-0.076
Running|162.103.172.46|3.345|-0.076
Not Running|||
Not Running|Unknown|Unknown|Unknown
Why does string concat apply not work as expected?

Why does string concat apply not work as expected?


By : user7888626
Date : March 29 2020, 07:55 AM
it should still fix some issue The first argument of apply is the context, which needs to be the string. You'd use
code :
const arr = ["2","3"];
console.log("1".concat(...arr));
console.log(String.prototype.concat.apply("1", arr));
console.log("".concat.apply("1", arr));
function concat(x, ...args) {
    return x.concat(...args);
}
function concat(x) {
    var args = Array.prototype.slice.call(arguments, 1);
    return x.concat.apply(x, args);
//                        ^
}
Related Posts Related Posts :
  • Creating a Dataframe of Proportions
  • Scrapy with dynamic captcha
  • In python, how do I get urllib to recognize multiple lines in a string as separate URLs?
  • Add prefix and suffix to each element of a nested list
  • Generate string set from csv file in Python
  • Custom usage message for many-valued argument
  • Python Class, how to skip a wrong entry and proceed to next entry
  • Numpy efficient way to parse array of string
  • Kivy , Python: Update Label on_file_drop
  • What does it mean if a deeper conv layer converges first?
  • Selecting User in client.send_message() from arg list
  • python slicing multi levels list of dict using list comprehension
  • Value Error problem with multicell Dimensions must be equal, but are 20 and 13
  • How to print a board with coordinates?
  • Keras LSTM shape doesn't contain length of sequence
  • Boxplot with Pandas in Python
  • How can I rename a PySpark dataframe column by index? (handle duplicated column names)
  • How to calculate hash of a python class object
  • Using ideas from HashEmbeddings with sklearn's HashingVectorizer
  • keycloak.exceptions.KeycloakGetError: 404: b'' using Python 3.7
  • How to modify a column in a SQLite3?
  • VS Integration Services: flat file source to OLE DB destination - detect new data columns in file, add columns to table,
  • Customize xticks in matplotlib plot
  • How can I show the image in a labelframe which is inserted through askopenfilename?
  • Boxplot with distibution size histogram on top (and median regression)
  • Fit differential equation with scipy
  • ModuleNotFoundError: Correct setup
  • How to pass rendered plot to a html file through render_template?
  • Create flat ndarray from DataFrame column containing arrays
  • Bring radial axes labels in front of lines of polar plot matplotlib
  • Python3: Unable to split word from parsed data
  • Using Python to login to a website and web scrape
  • Customise shift in matplotlib offset
  • Combining and Reshaping rows and columns of 2 dataframes in R or Python
  • Regex condition after and before a known phrase
  • subplots based on records of two different pandas DataFrames ( with same structure) using Seaborn or Matplotlib
  • find numpy array in other numpy array
  • Print Triangle Pyramid pattern using for loop python
  • Python Script Running through Command Line Not Creating CSV
  • Questions about Subclassing
  • Creating list with dictionary instead of multiple dictionaries in python
  • Sorting queryset results in a template
  • Django Rest Framework allow not authenticated access to a view in certain cases
  • How do I efficiently map integers to URIs in a multidemnsional array?
  • Installing Python packages for Visual Studio Code
  • How to merge two columns into one in pandas dataframe
  • Decompose string of different symbols in python
  • pandas merge and group concat
  • How to traverse tree for making binary code from a HuffmanTree?
  • Check if IP is in network on Python3
  • non equally spaced points along x-axis in a plot
  • Concatenation of text files consisting list of lists?
  • Use regex to parse characters on a line of text
  • pandas df.fillna - filling NaNs after outer join with correct values
  • How can I undo a time series conversion of a pandas dataframe?
  • Virtual environment is not working in Django
  • FileNotFoundError in Python during Arabic text analysis
  • How to read email using python and smtplib
  • How to write a function which takes a string and turns into a single digit?
  • Linear Regression without Least Squares in sklearn
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org