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

FWIW here is one way to add the rows of a matrix:
#lang racket
(require math/matrix)
(for/fold ([result (matrix [[0 0]])])
([row (matrix-rows (matrix [[1 2] [3 4]]))])
(matrix+ result row))
2014-11-28 22:41 GMT+01:00 Animesh Pandey <animeshpandey.etno at gmail.com>:
>* 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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*>* Racket Users list:
*>* http://lists.racket-lang.org/users
*>*
*
--
--
Jens Axel Søgaard