daviddavo

daviddavo

# Copyright (c) Recommenders contributors.
# Licensed under the MIT License.

import random
import numpy as np
import pandas as pd
import scipy.sparse as sp

from recommenders.utils.constants import (
    DEFAULT_ITEM_COL,

daviddavo

/*
This program should split xblock-eth's CSV files into smaller files that fit into
memory.

The program checks the two numbers in the filename and takes N extra digits.
With N=1, it converts a file like 1000to1099_... into 10 files: 1000to1019_..., etc.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

daviddavo

# See https://math.stackexchange.com/posts/5026786

def submatrices(A):
    d = len(A)
    d2 = d//2
    return [ [ [ [ A[d2*i + k][ d2*j+l] for l in range(d2) ] for k in range(d2) ] for j in range(2) ] for i in range(2) ]

def combine(A):
    d = len(A[0][0])
    d2 = d*2