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+# [[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