Replace cellfun() occurrences with faster code where possible. * scripts/help/doc_cache_create.m: Use built-in "isclass" rather than ischar. Use addpath and rmpath with multiple inputs rather than cellfun. * scripts/image/imformats.m: Use isfield with cell string list rather than cellfun. * scripts/image/private/__imread__.m: Use ismember to replace cellfun/strcmpi combo. * scripts/miscellaneous/what.m: Re-order if/elseif tree. * scripts/pkg/private/rebuild.m: Replace cellfun with strcat call. * scripts/plot/axis.m: Use comma-separated lists to replace cellfun. * scripts/plot/pareto.m: Use cellstr on char array to replace cellfun. * scripts/plot/private/__gnuplot_print__.m: Use @times, rather than anonymous function, in cellfun call. * scripts/plot/private/__line__.m: White space cleanup. * scripts/plot/private/__patch__.m: Use ismember to replace cellfun/strcmpi combo. Use in-place '|=' operator for performance. * scripts/plot/struct2hdl.m: Use ismember to replace cellfun/strcmp combo. * scripts/polynomial/splinefit.m: Use built-in "isclass" rather than ischar. * scripts/special-matrix/gallery.m: Remove anonymous functions inside cellfuns. * scripts/strings/strsplit.m: Correct comment character to '#' from '%'. * scripts/strings/untabify.m: Use multiple argument form of cellfun to get rid of anonymous function. * scripts/testfun/__run_test_suite__.m: Remove anonymous function from within cellfun. * scripts/ui/inputdlg.m: Use built-in "isclass" rather than ischar.

--- a/scripts/help/doc_cache_create.m
+++ b/scripts/help/doc_cache_create.m
@@ -42,7 +42,7 @@
   if (isempty (directory))
     cache = gen_builtin_cache ();
   elseif (iscell (directory))
-    if (all (cellfun (@ischar, directory)))
+    if (all (cellfun ("isclass", directory, "char")))
       cache = gen_doc_cache_in_dir (directory);
     else
       error ("doc_cache_create: cell must contain only strings");
@@ -95,7 +95,7 @@
 
   ## For each function:
   for n = 1:length (list)
-    f = list {n};
+    f = list{n};
 
     ## Get help text
     [text, format] = get_help_text (f);
@@ -108,9 +108,9 @@
     endif
 
     ## Store the help text
-    cache (1, end+1) = f;
-    cache (2, end) = text;
-    cache (3, end) = first_sentence;
+    cache(1, end+1) = f;
+    cache(2, end) = text;
+    cache(3, end) = first_sentence;
   endfor
 endfunction
 
@@ -127,19 +127,19 @@
 
   ## add them
   if (! isempty (dirs_notpath))
-    cellfun (@addpath, dirs_notpath);
+    addpath (dirs_notpath{:});
   endif
 
   ## create cache
   func = @(s_) create_cache (__list_functions__ (s_));
-  cache = cellfun (func, directory, 'UniformOutput', false);
+  cache = cellfun (func, directory, "UniformOutput", false);
 
   ## concatenate results
   cache = [cache{:}];
 
   ## remove dirs form path
   if (! isempty (dirs_notpath))
-    cellfun (@rmpath, dirs_notpath);
+    rmpath (dirs_notpath{:});
   endif
 
 endfunction