New welcome message

BHYWI-08-01-E/main.cpp

@@ -3,7 +3,8 @@
 int main(int argc, char *argv[])
 {
   QApplication app(argc, argv);
-  QLabel *label = new QLabel("<h1><i>Hello<!i>""<font color=red>Qt!</font></h1>");
+  //  QLabel *label = new QLabel("<h1><i>Hello<!i>""<font color=red>Qt!</font></h1>");
+  QLabel *label = new QLabel("<h1>Hallo Hydroinformatik II 2019. Wir nutzen GitHub für die Übungen</h1>");
   label->show();
   return app.exec();
 }

BHYWI-08-02-E-Script/BHYWI-08-02-E-Python.pro

@@ -0,0 +1,21 @@
+######################################################################
+# Automatically generated by qmake (3.1) Thu May 16 22:39:55 2019
+######################################################################
+
+TEMPLATE = app
+TARGET = BHYWI-08-02-E-Python
+INCLUDEPATH += .
+
+# The following define makes your compiler warn you if you use any
+# feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+# Input
+SOURCES += main.cpp

BHYWI-08-02-E-Script/data_from_file.py

@@ -0,0 +1,19 @@
+import matplotlib.pyplot as plt
+import csv
+
+x = []
+y = []
+
+with open('out.csv','r') as csvfile:
+    plots = csv.reader(csvfile, delimiter=',')
+    for row in plots:
+        x.append(float(row[0]))
+        y.append(float(row[1]))
+
+plt.plot(x,y, label='Data loaded from file: out.cvs')
+plt.xlabel('x')
+plt.ylabel('y')
+plt.title('Hydroinformatics II\nExercise BHYWI-08-02-for-python')
+plt.legend()
+plt.savefig("test1.png")
+plt.show()

BHYWI-08-02-E-Script/diffusion-equation.py

@@ -0,0 +1,20 @@
+import math
+import matplotlib.pylab as plt
+PI = 3.14159265358979323846
+numPoints = 100
+alpha = 1.0
+t = [0.1,0.5,1.0,2.0]
+x = []
+y = []
+for n in t:
+    for i in range(0,numPoints+1):
+        x.append(float(i)/float(numPoints))
+        y.append(math.sin(PI*x[i]) * math.exp(-alpha*n*n))
+    plt.plot(x,y,color='red',marker="o")
+    x = []
+    y = []
+plt.xlabel('x')
+plt.ylabel('u')
+plt.axis('tight')
+plt.savefig("diffusion-equation.png")
+plt.show()

BHYWI-08-02-E-Script/main.cpp

@@ -0,0 +1,29 @@
+#include <cmath>
+#include <fstream>
+#define PI 3.14159265358979323846
+
+int main(int argc, char *argv[])
+{
+  //1-Definitionen
+  int numPoints = 1000;
+  double x,y,alpha=1.,t=0.01;
+  std::ofstream out_file;
+  out_file.open("out.csv");
+  //2-Berechnung
+  //y = sin(pi*x) * exp(-alpha*t^2)
+  for (int i = 0; i < numPoints+1; ++i)
+  {
+    x = double(i)/double(numPoints);
+    //y=sin(PI*x) * exp(-alpha*t*t);
+    //y=sin(sqrt(PI*alpha)*x) * exp(-PI*t);
+    //y=sin(PI/sqrt(alpha)*x) * exp(-PI*PI*t);
+    y=sin(PI*x) * exp(-alpha*PI*PI*t);
+    out_file << x << "," << y << std::endl;
+  }
+  //3-Ausgabe
+}
+//HW1 L�sung: y=sin(sqrt(pi*alpha)*x) * exp(-pi*t) plotten
+//HW2 L�sung: y=sin(pi/sqrt(alpha)*x) * exp(-pi*pi*t) plotten
+//HW3 L�sung: y=sin(pi*x) * exp(-alpha*pi*pi*t) plotten
+//HW4 L�sungen vergleichen
+//HW5 Verschiedene Zeiten (aus Eingabedatei) lesen und rechnen