From 62633fa9fb01e15466ed0e700793fcdafcc40fdc Mon Sep 17 00:00:00 2001
From: Trygve <trygve@posteo.net>
Date: Mon, 23 Oct 2023 21:45:15 +0200
Subject: [PATCH] Innlevering 3 og 4

---
 inf120stat.py | 23 +++++++++++++++++++++++
 smitte.py     | 34 ++++++++++++++++++++++++++++++++++
 stat_kalk.py  | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 108 insertions(+)
 create mode 100644 inf120stat.py
 create mode 100644 smitte.py
 create mode 100644 stat_kalk.py

diff --git a/inf120stat.py b/inf120stat.py
new file mode 100644
index 0000000..a580733
--- /dev/null
+++ b/inf120stat.py
@@ -0,0 +1,23 @@
+from math import sqrt, isclose
+
+def mean(l):
+    return sum(l)/len(l)
+
+def std(l):
+    m = mean(l)
+    diffs = [(x-m)**2 for x in l]
+    return sqrt(sum(diffs)/len(diffs))
+
+def test_mean():
+    l = [1.0, 2.0, 3.0, 4.0]
+    expected = 2.5
+    return isclose(mean(l),  expected, abs_tol=0.001)
+
+def test_std():
+    l = [1.0, 2.0, 3.0, 4.0]
+    expected = 1.11803
+    return isclose(std(l), expected, abs_tol=0.001)
+
+if __name__ == '__main__':
+    print('mean:', test_mean())
+    print('std:', test_std())
\ No newline at end of file
diff --git a/smitte.py b/smitte.py
new file mode 100644
index 0000000..05b65e9
--- /dev/null
+++ b/smitte.py
@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+"""Created on 23.10"""
+__author__ = "Trygve B. Nomeland"
+__email__ = "trygve.borte.nomeland@nmbu.no"
+
+""""
+SIR modell av en pandemi:
+S (Susceptible) – folk som ikke er eller har vært syke og som kan smittes
+I (Infectious) – folk som er syke og som kan smitte andre
+R (Recoverd) – folk har vært syke og har blitt friske igjen. Modellen antar at disse ikke kan bli syke igjen.
+_y betyr verdi fra forrige steg
+"""
+def updateSIR(s_y, i_y, r_y, b, k):
+    return {'s': s_y - b*s_y*i_y, 'i': i_y + b*s_y*i_y-k*i_y, 'r': r_y + k*i_y}
+
+# Generator som kjører simulasjonen frem til "stop" verdien
+def genSIR(s_0, i_0, r_0, stop, b=1/3, k=1/10,):
+    SIR = {'s': s_0, 'i': i_0, 'r': r_0}
+    yield SIR
+    n = 0
+    while n < stop:
+        n += 1
+        SIR = updateSIR(SIR.get('s'), SIR.get('i'), SIR.get('r'), b, k)
+        yield SIR
+
+def main():
+    f = open('pan.csv', 'w')
+    f.write('Day,s@day,i@day,r@day\n')
+    for n, S in enumerate(genSIR(1, 10/(5*10**6), 0, stop=120)):
+        f.write(f'{n},{S.get('s'):.3e},{S.get('i'):.3e},{S.get('r'):.3e}\n')
+    f.close()
+
+if __name__ == '__main__':
+    main()
\ No newline at end of file
diff --git a/stat_kalk.py b/stat_kalk.py
new file mode 100644
index 0000000..ad3633c
--- /dev/null
+++ b/stat_kalk.py
@@ -0,0 +1,51 @@
+import inf120stat as stat
+
+def choose_action():
+    #returns number from 1 to 5
+    print("""
+ESP meny:
+    1. Les inn verdier
+    2. Tøm verdi listen
+    3. Vis gjennomsnitt og standardavvik
+    4. List ut verdiene
+    5. Avslutt
+Ditt valg:""")
+    i = int(input())
+    if i not in range(1,6): raise ValueError()
+    return i
+
+def read_values(values):
+    while True:
+        try:
+            values.append(float(input('Ny verdi (Enter = slutt):')))
+        except ValueError:
+            print('Verdier kan kunn være gyldige flyttall!')
+            break
+    return values
+
+def print_statistics(values):
+    return(f'Antall verdier: {len(values)}, gjennomsnitt: {stat.mean(values):.2f}, standardavvik: {stat.std(values):.2f}')
+
+def main():
+    print('Starter Enkelt statistikk program (ESP)')
+    values = []
+    while True:
+        match choose_action():
+            case 1:
+                # Write numbers
+                read_values(values)
+            case 2:
+                values = []
+            case 3:
+                #mean, std
+                try:
+                    print(print_statistics(values))
+                except ZeroDivisionError:
+                    print('Tom liste!')
+            case 4:
+                print(values)
+            case 5:
+                exit('Hadebra :)')
+
+if __name__ == '__main__':
+    main()
\ No newline at end of file