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I have .json file like this:

I have a dataset with about 50 columns (all indicators I got from World Bank), Country Code and Year. These 50 columns are not all complete, and I would like to fill in the missing values based on an lm fit for the column for that specific country. For example:

Doing this for a single country and a single column is absolutely fine when following these steps here: Filling NA using linear regression in R

However, I have over 180 different countries I want to do this to. And I want this to work for each indicator per country (so 50 columns total) So in a way, each country and each column would have its own linear regression model that fills out the missing values.

Here is how it looked after I did the steps above: This is the expected output for ONE column. I would like to do this for EVERY column by individual country groups.

However, the data looks like this:

There are numerous countries and columns that I want to perform this on just like the post above.

This is for a project I am working on for my data-mining / statistics class. Any help would be appreciated and thanks so much in advance!

EDIT

I tried this:

I have to upload one file in different places on the web using katalon

I am using:

'Upload test-photo.png to input_browse'

I wrote a script to import the characterization factors of the LCIA method EF 3.0 (adapated) on Brightway. I think it works fine as I see the right characterization factors on the Activity Browser (ex for the Climate Change method : but when I run calculations with the method, the results are not the same as on Simapro (where I got the CSV Import File from) : And for instance the result is 0 for the Climate Change method. Do you know what can be the issue ? It seems that the units are different but it is the same for the other methods that are available on Brightway.

Besides, I saw on another question that there would be a method implemented to import the EF 3.0 method, is it available yet ? Thank you very much for your help.

Code of the importation script :

I am using Synth() package (see ftp://cran.r-project.org/pub/R/web/packages/Synth/Synth.pdf) in R.

This is a part of my data frame:

I am trying to remove a few letters after a special character (either : or -).

I have tried things like this but the result is not satisfactory:

when i use tkinter button i get the results i want though i'm using tkinter button from tkmacosx library as it supports background color. The problem is when i replace normal button with tkmacosx button they appear like dots.

Here is my sample data:

i need to flat the object values in javascript . the ent is the input array . the first object the language consist of array of array values i need to flat the object value .[[{}],[{}],[{}]]

experted the value to be language: [{},{},{}];