* Tamas K Papp <[EMAIL PROTECTED]> : | | I am a Lisp newbie, sorry if this question has a simple answer, I | tried googling and found nothing. | | Consider an n-dimensional simple array, eg | | (setf a (make-array '(2 3 4) :element-type 'double-float)) | | If I understand correctly, a simple boxed array is just a vector of | numbers (in this case, 12 zeros), and information on the dimension (2 | 3 4). Is it possible to "reshape" the array by changing only the | latter? Eg
There are 24 elements in the array. Perhaps you can use a displaced-array for your purpose Try (defparameter $b (make-array '(6 4) :displaced-to a :element-type 'double-float)) And read the common lisp hyperspec entry for MAKE-ARRAY which talks about :dipsplaced-to and :displaced-index-offset for displaced arrays and also 15.1.1.3.2.1 | (reshape a '(4 3)) | | would give a 4x3 array with the same elements, etc. A special case | would be reshaping to a simple vector, or reshaping a simple vector to | an array. | | Is there such a function already in CMUCL, or is it possible to write | one without too much hassle? Even a desctructive reshape! would be | enough for my purposes. -- Madhu
