Just another update

Task/Fibonacci-sequence/MATLAB/fibonacci-sequence-1.m

@@ -1,16 +1,6 @@
-function F = fibonacci(n)
-
-    Fn = [1 0]; %Fn(1) is F_{n-2}, Fn(2) is F_{n-1}
-    F = 0; %F is F_{n}
-
-    for i = (1:abs(n))
-        Fn(2) = F;
-        F = sum(Fn);
-        Fn(1) = Fn(2);
-    end
-
-    if n < 0
-        F = F*((-1)^(n+1));
-    end
-
+function f = fib(n)
+	
+	f = [1 1 ; 1 0]^(n-1);
+	f = f(1,1);
+	
 end

Task/Fibonacci-sequence/MATLAB/fibonacci-sequence-2.m

@@ -1,13 +1,16 @@
-function number = fibonacci2(n)
+function F = fibonacci(n)
 
-    if n == 1
-        number = 1;
-    elseif n == 0
-        number = 0;
-    elseif n < 0
-        number = ((-1)^(n+1))*fibonacci2(-n);;
-    else
-        number = det(gallery('dramadah',n,3));
+    Fn = [1 0]; %Fn(1) is F_{n-2}, Fn(2) is F_{n-1}
+    F = 0; %F is F_{n}
+
+    for i = (1:abs(n))
+        Fn(2) = F;
+        F = sum(Fn);
+        Fn(1) = Fn(2);
+    end
+
+    if n < 0
+        F = F*((-1)^(n+1));
     end
 
 end

Task/Fibonacci-sequence/MATLAB/fibonacci-sequence-3.m

@@ -0,0 +1,13 @@
+function number = fibonacci2(n)
+
+    if n == 1
+        number = 1;
+    elseif n == 0
+        number = 0;
+    elseif n < 0
+        number = ((-1)^(n+1))*fibonacci2(-n);;
+    else
+        number = det(gallery('dramadah',n,3));
+    end
+
+end