A data frame is a tabular data structure. Usually, it contains data where rows are observations and columns are variables of various types. While "data frame" or "dataframe" is the term used for this concept in several languages (R, Apache Spark, deedle, Maple, the pandas library in Python and the DataFrames library in Julia), "table" is the term used in MATLAB and SQL.
Je récupère un tableau de Wikipedia en utilisant python. J'ai terminé avec le code, mais j'ai quelques problèmes pour extraire des colonnes spécifiques au format ...
J'ai un dataframe comme celui-ci: sort_idx = df1['col1'].apply(np.argsort).values
for rowidxval, (index, row) in enumerate(df1.iterrows()):
df1['col1'][index] = df1['col1'][index][sort_id ...
