diff --git a/src/NotWorking/fade_in.m b/src/NotWorking/fade_in.m
index 254d288..bebb07f 100644
--- a/src/NotWorking/fade_in.m
+++ b/src/NotWorking/fade_in.m
@@ -12,10 +12,21 @@ function output = fade_in(input, time)
     
     len = length(input);
     
+    % need to use whole number for time
+    time = round(time);
+    
     % if time parameter longer than signal, treat time as
     % the duration of original signal
     if time > len
-        time = len
+        time = len;
+    end
+    
+    % in order to create array, time >=1
+    % if not, it's arbitrarily set to 1
+    % in which case the fade_in effect
+    % is virtually nonexistent
+    if time < 1
+        time = 1;
     end
 
     % set multiplier as 1D array