# [racket] How to iterate through the arrays in a matrix?

Could you please give a few examples, with inputs and desire outputs?
Dan
On Nov 29, 2014 8:57 AM, "Animesh Pandey" <animeshpandey.etno at gmail.com>
wrote:
>* (map
*>* (λ(i)
*>* (matrix-
*>* (list->matrix 1 4 i)
*>* (list->matrix 1 4 arr)))
*>* final-data)
*>*
*>* I used this method where final-data is a list of lists and I iterate
*>* through each list, convert it to a matrix and then subtract a pre-defined
*>* constant list to it. What I really need is a way to iterate through a
*>* matrix and not a list of lists as I have do to a lot of matrix operations.
*>*
*>*
*>* On Fri, Nov 28, 2014 at 4:41 PM, Animesh Pandey <
*>* animeshpandey.etno at gmail.com> wrote:
*>*
*>>* Hi,
*>>* I have a 80 X 4 matrix. I have iterate through each row and subtract each
*>>* row with another array at each iteration. At first I thought to convert all
*>>* array to list and do all the operations and then again convert the final
*>>* list if lists to a matrix. But I somehow think that is not a suited way. I
*>>* tried using "for*/matrix" but could not get it right. Could any one give an
*>>* example on how to iterate a matrix (array for arrays)?
*>>*
*>>* My matrix looks like this:
*>>* > (list*->matrix final-data)
*>>* (array
*>>* #[#[5.1 3.5 1.4 0.2]
*>>* #[4.9 3.0 1.4 0.2]
*>>* #[4.7 3.2 1.3 0.2]
*>>* #[4.6 3.1 1.5 0.2]
*>>* #[5.0 3.6 1.4 0.2]
*>>* #[5.4 3.9 1.7 0.4]
*>>* #[4.6 3.4 1.4 0.3]
*>>* #[5.0 3.4 1.5 0.2]
*>>* #[4.4 2.9 1.4 0.2]
*>>* #[4.9 3.1 1.5 0.1]
*>>* ...........
*>>*
*>>* Thanks!
*>>*
*>*
*>*
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