added program of matrix multiplication & transpose

rahulhgdev · web-flow · commit 015f060c60d0 · 2021-01-29T14:14:43.000+05:30
diff --git a/Beginner_Level_Python_programs/Matrix_transpose.py b/Beginner_Level_Python_programs/Matrix_transpose.py
@@ -0,0 +1,17 @@
+# Program to transpose a matrix using a nested loop
+
+X = [[12,7],
+    [4 ,5],
+    [3 ,8]]
+
+result = [[0,0,0],
+         [0,0,0]]
+
+# iterate through rows
+for i in range(len(X)):
+   # iterate through columns
+   for j in range(len(X[0])):
+       result[j][i] = X[i][j]
+
+for r in result:
+   print(r)
diff --git a/Beginner_Level_Python_programs/multiply_two_matrix.py b/Beginner_Level_Python_programs/multiply_two_matrix.py
@@ -0,0 +1,25 @@
+# Program to multiply two matrices using nested loops
+
+# 3x3 matrix
+X = [[12,7,3],
+    [4 ,5,6],
+    [7 ,8,9]]
+# 3x4 matrix
+Y = [[5,8,1,2],
+    [6,7,3,0],
+    [4,5,9,1]]
+# result is 3x4
+result = [[0,0,0,0],
+         [0,0,0,0],
+         [0,0,0,0]]
+
+# iterate through rows of X
+for i in range(len(X)):
+   # iterate through columns of Y
+   for j in range(len(Y[0])):
+       # iterate through rows of Y
+       for k in range(len(Y)):
+           result[i][j] += X[i][k] * Y[k][j]
+
+for r in result:
+   print(r)
