diff --git a/.gitattributes b/.gitattributes
deleted file mode 100644
index bdb0cab..0000000
--- a/.gitattributes
+++ /dev/null
@@ -1,17 +0,0 @@
-# Auto detect text files and perform LF normalization
-* text=auto
-
-# Custom for Visual Studio
-*.cs     diff=csharp
-
-# Standard to msysgit
-*.doc	 diff=astextplain
-*.DOC	 diff=astextplain
-*.docx diff=astextplain
-*.DOCX diff=astextplain
-*.dot  diff=astextplain
-*.DOT  diff=astextplain
-*.pdf  diff=astextplain
-*.PDF	 diff=astextplain
-*.rtf	 diff=astextplain
-*.RTF	 diff=astextplain
diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 7cae593..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,55 +0,0 @@
-# Windows image file caches
-Thumbs.db
-ehthumbs.db
-
-# Folder config file
-Desktop.ini
-
-# Recycle Bin used on file shares
-$RECYCLE.BIN/
-
-# Windows Installer files
-*.cab
-*.msi
-*.msm
-*.msp
-
-# Windows shortcuts
-*.lnk
-
-# =========================
-# Operating System Files
-# =========================
-
-# OSX
-# =========================
-
-.DS_Store
-.AppleDouble
-.LSOverride
-
-# Thumbnails
-._*
-
-# Files that might appear in the root of a volume
-.DocumentRevisions-V100
-.fseventsd
-.Spotlight-V100
-.TemporaryItems
-.Trashes
-.VolumeIcon.icns
-
-# Directories potentially created on remote AFP share
-.AppleDB
-.AppleDesktop
-Network Trash Folder
-Temporary Items
-.apdisk
-
-# Added manually
-MATLp.txt
-MATLc.m
-funDef_outtakes.txt
-defin
-inout
-defout
\ No newline at end of file
diff --git a/MATL_spec.pdf b/MATL_spec.pdf
index 67d5f53..fefbe05 100644
Binary files a/MATL_spec.pdf and b/MATL_spec.pdf differ
diff --git a/funDef.mat b/funDef.mat
index ca6bd88..1c5a6e0 100644
Binary files a/funDef.mat and b/funDef.mat differ
diff --git a/funDef.txt b/funDef.txt
index eea8f5a..2b2b4fe 100644
--- a/funDef.txt
+++ b/funDef.txt
@@ -23,7 +23,7 @@ Z!	1	1	1	1	1	1	true	true	out{1} = full(in{1});	convert sparse matrix to full mat
 "					
 X"	2	inf	3	1	1	1	true	true	out{1} = repmat(in{:});	replicate and tile array	\matlab+repmat+
 Y"	2	inf	2	1	1	1	true	true	out{1} = repelem(in{:});	replicate elements of array	\matlab+repelem+ (run-length decoding)
-Z"
+Z"	1	1	1	1	1	1	true	true	out{1} = blanks(in{1});	string of blanks	\matlab+blanks+
 #	1	1	1	0	0	0	false	false	S_OUT = STACK{end}; STACK(end) = [];	output specification	specify outputs for next function
 % The numbers of inputs and outputs for # are not used by the code, but are used for generating the help file
 X#	
@@ -359,14 +359,14 @@ O	0	inf	0	1	1	1	true	true	if numel(in)==0, out{1} = 0; else out{1} = zeros(in{:}
 XO	1	4	1	1	1	1	true	true	out{1} = datestr(in{:});	string representation of date	\matlab+datestr+
 YO	1	6	1	1	1	1	true	true	out{1} = datenum(in{:});	serial date number	\matlab+datenum+
 ZO	1	3	1	1	6	1	true	true	[out{:}] = datevec(in{:});	date components	\matlab+datevec+
-P	1	2	1	1	1	1	true	true	out{1} = flip(in{:});	flip the order of elements	\matlab+flip+					
-XP	1	2	1	1	1	1	true	true	out{1} = pdist(in{:});	pairwise distances between points	\matlab+pdist+
-YP	2	5	2	1	1	1	true	true	out{1} = pdist2(in{:});	pairwise distances between two sets of points	\matlab+pdist2+
-ZP	2	3	2	1	1	1	true	true	if numel(in)==2, out{1} = polyval(in{:}); else out{1} = polyval(in{1},in{2},[],in{3}); end	evaluate polynomial	If $2$ inputs \matlab+p+ and \matlab+x+: \matlab+y=polyval(p,x)+. If $3$ inputs \matlab+p+, \matlab+x+ and \matlab+mu+: \matlab+y=polyval(p,x,[],mu)+
+P	1	2	1	1	1	1	true	true	out{1} = flip(in{:});	flip the order of elements	\matlab+flip+. \sa \matl+XP+
+XP	1	1	1	1	1	1	true	true	out{1} = flipud(in{:});	flip array in up-down direction	\matlab+flipud+. \sa \matl+P+
+YP	0	0	0	1	1	1	true	true	out{1} = pi;	pi	\matlab+pi+
+ZP	2	5	2	1	1	1	true	true	out{1} = pdist2(in{:});	pairwise distances between two sets of points	\matlab+pdist2+. Only predefined distance functions are allowed
 Q					
 XQ					
 YQ					
-ZQ					
+ZQ	2	3	2	1	1	1	true	true	if numel(in)==2, out{1} = polyval(in{:}); else out{1} = polyval(in{1},in{2},[],in{3}); end	evaluate polynomial	If $2$ inputs \matlab+p+ and \matlab+x+: \matlab+y = polyval(p,x)+. If $3$ inputs \matlab+p+, \matlab+x+ and \matlab+mu+: \matlab+y = polyval(p,x,[],mu)+
 R	1	2	1	1	1	1	true	true	out{1} = triu(in{:});	upper triangular part	\matlab+triu+. \sa \matl+XR+.
 XR	1	1	1	1	1	1	true	true	out{1} = triu(in{1},1);	upper triangular part, above diagonal	\matlab+triu(..., 1)+. \sa \matl+R+.
 YR	1	2	1	1	1	1	true	true	out{1} = tril(in{:});	lower triangular part	\matlab+tril+. \sa \matl+ZR+.
@@ -374,14 +374,15 @@ ZR	1	1	1	1	1	1	true	true	out{1} = tril(in{1},-1);	lower triangular part, without
 S	1	3	1	1	2	1	true	true	if numel(in)==2 && in{2}<0, in{2}=-in{2}; in{3} = 'descend'; end, [out{:}] = sort(in{:});	sort	\matlab+sort+. If $2$ inputs: a negative value of the second input corresponds to descending order
 XS	1	2	1	1	2	1	true	true	[out{:}] = sortrows(in{:});	sort rows	\matlab+sortrows+				
 YS	2	3	2	1	1	1	true	true	out{1} = circshift(in{:});	circular shift	\matlab+circshift+
-ZS	1	2	1	1	1	1	true	true	out{1} = squareform(in{:});	reformat distance matrix between upper triangular and square form	\matlab+squareform+
+ZS	1	4	1	1	1	1	true	true	out{1} = std(in{:});	standard deviation	\matlab+std+
 T					
-XT	0	0	0	1	1	1	true	true	out{1} = pi;	pi	\matlab+pi+
+XT
 YT	1	2	2	1	1	1	true	true	out{1} = toeplitz(in{:});	Toeplitz matrix	\matlab+toeplitz+					
 ZT					
-U
-XU					
-YU					
+U	1	1	1	1	1	1	true	true	out{1} = str2double(in{:});	convert string to double precision value	\matlab+str2double+
+XU	1	1	1	1	2	1	true	true	assert(isempty(regexp(in{1}, '^[^'']*(''[^'']*''[^'']*)*[a-zA-Z]{2}', 'once')), 'MATL:runtime', 'MATL run-time error: content not allowed')	convert string matrix to numeric array	\matlab+str2num+ with content checking
+									[out{:}] = str2num(in{:});
+YU	1	2	1	1	1	1	true	true	out{1} = num2str(in{:});	convert numbers to a string	\matlab+num2str+
 ZU					
 V					
 XV					
@@ -392,7 +393,7 @@ XW
 YW					
 ZW					
 X					
-XX	2	9	2	1	6	1	true	true	[out{:}] = regexp(in{:});	match regular expression	\matlab+regexp+
+XX	2	9	2	1	6	1	true	true	if numel(in)==2, in{3} = 'match'; end, [out{:}] = regexp(in{:});	match regular expression	\matlab+regexp+. With $2$ inputs: \matlab+regexp(..., ..., 'match')+
 YX	3	5	3	1	1	1	true	true	[out{:}] = regexprep(in{:});	replace string using regular expression	\matlab+regexprep+	
 ZX					
 Y					
@@ -512,14 +513,13 @@ r	0	inf	0	1	1	1	true	true	out{1} = rand(in{:});	uniformly distributed pseudorand
 Xr	0	inf	0	1	1	1	true	true	if numel(in)==0, in{1} = 1; end; out{1} = randn(in{:});	normally distributed pseudorandom numbers	\matlab+randn+
 Yr	1	inf	1	1	1	1	true	true	if numel(in)==1, in{2} = 1; end; out{1} = randi(in{:});	pseudorandom integers from uniform discrete distribution	\matlab+randi+. If $1$ input: \matlab+randi(...,1)+
 Zr	2	4	2	1	1	1	true	true	out{1} = randsample(in{:});	random sample	\matlab+randsample+. Does not support stream specification
-s	1	4	1	1	1	1	true	true	out{1} = sum(in{:});	sum	\matlab+sum+
-Xs	1	3	1	1	1	1	true	true	out{1} = cumsum(in{:});	cumulative sum	\matlab+cumsum+
-Ys	1	2	1	1	1	1	true	true	out{1} = num2str(in{:});	convert numbers to a string	\matlab+num2str+
-Zs	1	4	1	1	1	1	true	true	out{1} = std(in{:});	standard deviation	\matlab+std+
+s	1	4	1	1	1	1	true	true	out{1} = sum(in{:});	sum	\matlab+sum+. \sa \matl+Xs+
+Xs	1	3	1	1	1	1	true	true	out{1} = sum(in{1},1,in{2:end});	sum along first dimension	\matlab+sum(..., 1, ...)+. \sa \matl+s+
+Ys	1	3	1	1	1	1	true	true	out{1} = cumsum(in{:});	cumulative sum	\matlab+cumsum+
+Zs	
 t	0	inf	1	0	0	0	false	true	out = in;	duplicate	duplicate elements in stack
-Xt	1	1	1	1	1	1	true	true	out{1} = str2double(in{:});	convert string to double precision value	\matlab+str2double+
-Yt	1	1	1	1	2	1	true	true	assert(isempty(regexp(in{1}, '^[^'']*(''[^'']*''[^'']*)*[a-zA-Z]{2}', 'once')), 'MATL:runtime', 'MATL run-time error: content not allowed')	convert string matrix to numeric array	\matlab+str2num+ with content checking
-									[out{:}] = str2num(in{:});
+Xt
+Yt
 Zt	3	3	3	1	1	1	true	true	[out{:}] = strrep(in{:});	replace substring with another	\matlab+strrep+
 u	1	4	1	1	3	1	true	true	[out{:}] = unique(in{:});	unique	\matlab+unique+. \sa \matl+Xu+.
 Xu	1	3	1	1	3	1	true	true	[out{:}] = unique(in{1},'rows',in{2:end});	unique rows	\matlab+unique(...,'rows',...)+. \sa \matl+u+.				
diff --git a/help.mat b/help.mat
index a0f9d20..2312e21 100644
Binary files a/help.mat and b/help.mat differ
diff --git a/matl.m b/matl.m
index c738efe..8342a94 100644
--- a/matl.m
+++ b/matl.m
@@ -12,6 +12,7 @@ function matl(varargin)
 indentCommentText = 1; % number of spaces before actual comment. Default value
 pOutFile = 'MATLp.txt'; % temporary file for parsed code
 cOutFile = 'MATLc.m'; % temporary file for compiled code
+ cOutFileNoExt = regexprep('MATLc.m', '\.m$', ''); % without extension. Needed to run file in olf Matlab versions
 funDefMasterFile = 'funDef.txt'; % function definition master file
 funDefMatFile = 'funDef.mat'; % function definition processed file
 preLitMasterFile = 'preLit.txt'; % master file that defines predefined strings with (key, value) pairs
@@ -246,7 +247,8 @@ function matl(varargin)
         %disp('--') %disp(repmat('-',size(str)))
         pause
     end
-    matl_run(S, pOutFile, cOutFile, [])
+    matl_run(S, pOutFile, cOutFileNoExt, []) % ...NoExt because a file name without extension is
+    % needed in old Matlab versions   
 end
 
 % Run compiled program in debug mode, if required
@@ -255,7 +257,8 @@ function matl(varargin)
         disp('Press any key to run MATL program in debug mode')
         pause
     end
-    matl_run(S, pOutFile, cOutFile, [S.compileLine])
+    matl_run(S, pOutFile, cOutFileNoExt, [S.compileLine]) % ...NoExt because a file name without
+    % extension is needed in old Matlab versions
 end
 
 
diff --git a/matl_compile.m b/matl_compile.m
index 051dbd2..cdd307d 100644
--- a/matl_compile.m
+++ b/matl_compile.m
@@ -48,7 +48,11 @@
 appendLines('% Set initial conditions', 0)
 appendLines('warningState = warning;', 0);
 appendLines('format compact; format long; warning(''off'',''all'');', 0) % clc
-appendLines('rng(''shuffle'')', 0)
+if exist('rng', 'file') % in case an old Matlab version is used
+    appendLines('rng(''shuffle'')', 0)
+else
+    warning('MATL has not been able to seed random number generator')
+end
 appendLines('diary off; delete defout; diary defout', 0)
 % For arrays with brackets or curly braces: F = false; T = true;
 appendLines('F = false; T = true;', 0)
diff --git a/preLit.mat b/preLit.mat
index 0a75da7..566b915 100644
Binary files a/preLit.mat and b/preLit.mat differ
diff --git a/preLit.txt b/preLit.txt
index 3b28591..7557194 100644
--- a/preLit.txt
+++ b/preLit.txt
@@ -142,8 +142,6 @@ X8
 15	'fro'
 16	'Smallest'
 17	'Largest'
-18	'tomatrix'
-19	'tovector'
 
 
 X9
@@ -237,4 +235,6 @@ Y2
 5	['0':'9' 'A':'F']
 11	'aeiou'
 12	'AEIOU'
-13	'aeiouAEIOU'
\ No newline at end of file
+13	'aeiouAEIOU'
+20	['Mon';'Tue';'Wed'; 'Thu';'Fri';'Sat'; 'Sun']
+21	[298 302 288 305 289 296 310]
\ No newline at end of file