Kayode week 17- Symmetric Matrix

week17/kayode/symmetric_matrix.md

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+---
+Author: Kayode
+---
+
+Symmetric Matrix
+
+Have the function SymmetricMatrix(strArr) read strArr which will be an array of integers represented as strings. Within the array there will also be "<>" elements which represent break points. The array will make up a matrix where the (number of break points + 1) represents the number of rows. Here is an example of how strArr may look: ["1","0","1","<>","0","1","0","<>","1","0","1"]. There are two "<>", so 2 + 1 = 3. Therefore there will be three rows in the array and the contents will be row1=[1 0 1], row2=[0 1 0] and row3=[1 0 1]. Your program should take the given array of elements, create the proper matrix, and then determine whether the matrix is symmetric, in other words, if matrix M is equal to M transpose. If it is, return the string symmetric and if it isn't return the string not symmetric. A matrix may or may not be a square matrix and if this is the case you should return the string not possible. For the example above, your program should return symmetric.
+
+Examples
+Input: ["5","0","<>","0","5"]
+Output: symmetric
+
+Input: ["1","2","4","<>","2","1","1","<>","-4","1","-1"]
+Output: not symmetric

week17/kayode/symmetric_matrix.py

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+def SymmetricMatrix(strArr):
+    mrows= []
+    mtrows= []
+    temprow= []
+    lencheck= []
+
+    if "<>" not in strArr:
+        return print("not possible")
+
+    for i in strArr:
+        if i == "<>":
+            mrows.append(temprow)
+            temprow= []
+            continue
+        temprow.append(i)
+    else:
+        mrows.append(temprow)
+        temprow= []
+
+    for i in mrows:
+        lencheck.append(len(i))
+
+    print(lencheck)
+    print(lencheck.count(lencheck[0]))
+    if lencheck.count(lencheck[0]) != lencheck[0] or lencheck.count(lencheck[0]) != len(lencheck):
+        return print("not possible")
+
+    loopcount= 0
+    indexcount= 0
+    while loopcount < lencheck[0]:
+        for i in mrows:
+            temprow.append(i[indexcount])
+        else:
+            mtrows.append(temprow)
+            temprow= []
+
+        loopcount= loopcount + 1
+        indexcount= indexcount + 1
+
+    if mrows == mtrows:
+        return print("symmetric")
+    else:
+        return print("not symmetric")
+
+
+
+
+# SymmetricMatrix(["1","0","1","<>","0","1","0","<>","1","0","1"])
+# SymmetricMatrix(["5","0","<>","0","5"])
+# SymmetricMatrix(["1","2","4","<>","2","1","1","<>","-4","1","-1"])
+# SymmetricMatrix(["21","41","81","161"])
+# SymmetricMatrix(["-6","1","-6","<>","-1","-1","-1"])
+# SymmetricMatrix(["1","2","4","<>","2","1","1","<>","1","1","1","<>","100"])