fix common functions

common/logsumexp.m

@@ -1,16 +1,16 @@
-function s = logsumexp(x, dim)
-% Compute log(sum(exp(x),dim)) while avoiding numerical underflow.
+function s = logsumexp(X, dim)
+% Compute log(sum(exp(X),dim)) while avoiding numerical underflow.
 %   By default dim = 1 (columns).
 % Written by Michael Chen ([email protected]).
 if nargin == 1, 
     % Determine which dimension sum will use
-    dim = find(size(x)~=1,1);
+    dim = find(size(X)~=1,1);
     if isempty(dim), dim = 1; end
 end
 
 % subtract the largest in each dim
-y = max(x,[],dim);
-s = y+log(sum(exp(bsxfun(@minus,x,y)),dim));   % TODO: use log1p
+y = max(X,[],dim);
+s = y+log(sum(exp(bsxfun(@minus,X,y)),dim));   % TODO: use log1p
 i = isinf(y);
 if any(i(:))
     s(i) = y(i);

common/normalize.m

@@ -4,7 +4,7 @@
 % Written by Michael Chen ([email protected]).
 if nargin == 1, 
     % Determine which dimension sum will use
-    dim = find(size(x)~=1,1);
+    dim = find(size(X)~=1,1);
     if isempty(dim), dim = 1; end
 end
 s = sum(X,dim);

common/standardize.m

@@ -4,7 +4,7 @@
 % Written by Michael Chen ([email protected]).
 if nargin == 1, 
     % Determine which dimension sum will use
-    dim = find(size(x)~=1,1);
+    dim = find(size(X)~=1,1);
     if isempty(dim), dim = 1; end
 end
 X = bsxfun(@minux,X,mean(X,2));

common/unitize.m

@@ -4,7 +4,7 @@
 % Written by Michael Chen ([email protected]).
 if nargin == 1, 
     % Determine which dimension sum will use
-    dim = find(size(x)~=1,1);
+    dim = find(size(X)~=1,1);
     if isempty(dim), dim = 1; end
 end
 s = sqrt(sum(X.^2,dim));