# [[2017-02-10] Challenge #302 [Hard] ASCII Histogram Maker: Part 2 - The Proper Histogram](https://www.reddit.com/r/dailyprogrammer/comments/5t7l07/20170210_challenge_302_hard_ascii_histogram_maker/)

## Description

Most of us are familiar with the histogram chart - a representation of a
frequency distribution by means of rectangles whose widths represent class
intervals and whose areas are proportional to the corresponding frequencies. It
is similar to a bar chart, but a histogram groups numbers into ranges. The area
of the bar is the total frequency of all of the covered values in the range. 

## Input Description

You'll be given four numbers on the first line telling you the start and end of
the horizontal (X) axis and the vertical (Y) axis, respectively. The next line
tells you the interval for the X-axis to use (the width of the bar). Then
you'll have a number on a single line telling you how many records to read.
Then you'll be given the data as 2 numbers: the first is the variable, the
second number is the frequency of that variable. Example:

    1 4 1 10
    2
    4
    1 3
    2 3
    3 2
    4 6

## Challenge Output

Your program should emit an ASCII histogram plotting the data according to the
specification - the size of the chart and the frequency of the X-axis,
variables. Example:

    10
     9
     8
     7
     6
     5
     4    ***
     3*** ***
     2*** ***
     1*** ***
      1 2 3 4

# Challenge Input

    0 40 0 100
    8
    40
    1 56
    2 40
    3 4
    4 67
    5 34
    6 48
    7 7
    8 45
    9 50
    10 54
    11 20
    12 24
    13 44
    14 44
    15 49
    16 28
    17 94
    18 37
    19 46
    20 64
    21 100
    22 43
    23 23
    24 100
    25 15
    26 81
    27 19
    28 92
    29 9
    30 21
    31 88
    32 31
    33 55
    34 87
    35 63
    36 88
    37 76
    38 41
    39 100
    40 6