A list of genetic variants (SNPs) passing a certain threshold.
import pandas as pd # Load the first 1000 rows to test df_preview = pd.read_csv('406K.txt', sep='\t', nrows=1000) print(df_preview.columns) # Load the full file if memory allows df = pd.read_csv('406K.txt', sep='\t') Use code with caution. Copied to clipboard 3. Cleaning the Data df.isnull().sum() Remove Duplicates: df.drop_duplicates()
A list of samples that passed genotype calling. Troubleshooting
If the file crashes your computer, use the chunksize parameter in Pandas to process it in smaller pieces.
Often used to filter a "white British" subset or a specific cohort of ~406,000 participants.
Check if the file is tab-separated (TSV) or comma-separated (CSV).
Based on the file name pattern, this is likely one of the following:
Do not open files larger than 100MB in Excel; it will truncate data.
