added example how to easily create a histogramm from much data

tikz/histogram-large-1d-dataset/process.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from __future__ import print_function
+import shutil
+import fileinput
+
+
+def main(filename, bins, maximum):
+    with open(filename) as f:
+        content = f.read().split("\n")
+    numbers = []
+    for line in content:
+        line = line.strip()
+        if line != "":
+            numbers.append(float(line))
+    numbers = sorted(numbers)
+    minimum = min(numbers)
+    bin_counter = [0 for i in range(bins+1)]
+    borders = []
+    for i, number in enumerate(numbers):
+        if number >= minimum + (maximum - minimum)/bins*(bins+1):
+            bin_counter[bins] += 1
+        elif number < minimum:
+            bin_counter[0] += 1
+        else:
+            for b in range(bins):
+                lower = minimum + (maximum - minimum)/bins*b
+                upper = minimum + (maximum - minimum)/bins*(b+1)
+                if lower <= number < upper:
+                    bin_counter[b] += 1
+                    break
+    for b in range(bins):
+        lower = minimum + (maximum - minimum)/bins*b
+        borders.append(str(lower))
+    borders.append("\infty")
+    return bin_counter, borders
+
+
+def modify_template(bin_counter, borders):
+    shutil.copyfile("histogram-large-1d-dataset.template.tex",
+                    "histogram-large-1d-dataset.tex")
+    xticklabels = ", ".join(map(lambda n: "$%s$" % n, borders))
+    coordinates = ""
+    for i, value in enumerate(bin_counter):
+        coordinates += "(%i, %i) " % (i, value)
+    for line in fileinput.input("histogram-large-1d-dataset.tex",
+                                inplace=True):
+        line = line.replace("{{xticklabels}}", xticklabels)
+        line = line.replace("{{coordinates}}", coordinates)
+        print(line, end='')
+
+
+if __name__ == '__main__':
+    from argparse import ArgumentParser
+    parser = ArgumentParser()
+    parser.add_argument("-f", "--file", dest="filename",
+                        default="1ddata.txt",
+                        help="use FILE as input data", metavar="FILE")
+    parser.add_argument("-b", "--bins", dest="bins", type=int,
+                        default=15,
+                        help="how many bins should be used")
+    parser.add_argument("-m", "--max", dest="max", type=float,
+                        default=15000,
+                        help=("what is the maximum number "
+                              "that should get binned?"))
+    args = parser.parse_args()
+    bin_counter, borders = main(args.filename, args.bins, args.max)
+    modify_template(bin_counter, borders)