1 files changed, 8 insertions, 34 deletions
diff --git a/subarray.txi b/subarray.txi
index 7d62ed6..1a0545f 100644
--- a/subarray.txi
+++ b/subarray.txi
@@ -36,31 +36,12 @@ shared.
 @end example
 @end defun
 
-@defun subarray0 array select @dots{}
 
-Behaves like @r{subarray}, but @r{align}s the returned array origin to
-0 @dots{}.
-@end defun
-
-@defun array-align array coord @dots{}
+@defvar subarray0
 
+Legacy alias for @r{subarray}.
+@end defvar
 
-Returns an array shared with @var{array} but with a different origin.  The @var{coords}
-are the exact integer coordinates of the new origin.  Indexes
-corresponding to missing or #f coordinates are not realigned.
-
-For example:
-@example
-(define ra2 (create-array '#(5) '(5 9) '(-4 0)))
-(array-shape ra2)                       @result{} ((5 9) (-4 0))
-(array-shape (array-align ra2 0 0))     @result{} ((0 4) (0 4))
-(array-shape (array-align ra2 0))       @result{} ((0 4) (-4 0))
-(array-shape (array-align ra2))         @result{} ((5 9) (-4 0))
-(array-shape (array-align ra2 0 #f))    @result{} ((0 4) (-4 0))
-(array-shape (array-align ra2 #f 0))    @result{} ((5 9) (0 4))
-@end example
-@end defun
-  
 @defun array-trim array trim @dots{}
 
 
@@ -73,22 +54,15 @@ bound.
 
 For example:
 @example
-(array-trim '#(0 1 2 3 4) 1)  @result{} #1A(1 2 3 4) ;; shape is ((0 3))
-(array-trim '#(0 1 2 3 4) -1) @result{} #1A(0 1 2 3) ;; shape is ((1 4))
+(array-trim '#(0 1 2 3 4) 1)  @result{} #1A(1 2 3 4)
+(array-trim '#(0 1 2 3 4) -1) @result{} #1A(0 1 2 3)
 
 (require 'array-for-each)
 (define (centered-difference ra)
-  (array-map - (array-trim ra 1) (array-trim ra -1)))
-(define (forward-difference ra)
-  (array-map - (array-trim ra 1) ra))
-(define (backward-difference ra)
-  (array-map - ra (array-trim ra -1)))
+  (array-map ra - (array-trim ra 1) (array-trim ra -1)))
 
 (centered-difference '#(0 1 3 5 9 22))
-  @result{} #1A(3 4 6 17) ;;shape is ((1 4))
-(backward-difference '#(0 1 3 5 9 22))
-  @result{} #1A(1 2 2 4 13) ;; shape is ((1 5))
-(forward-difference '#(0 1 3 5 9 22))
-  @result{} #(1 2 2 4 13)  ;; shape is ((0 4))
+  @result{} #(1 2 2 4 13)
 @end example
 @end defun
+