# Matrix input

**URL:** <https://discourse.julialang.org/t/matrix-input/43776>\
**Category:** New to Julia\
**Created:** [July 27, 2020, 5:06pm UTC](https://discourse.julialang.org/t/matrix-input/43776 "2020-07-27T17:06:51Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![mamo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mamo/32/25591_2.png) [@mamo](https://discourse.julialang.org/u/mamo)\
**Post date:** [July 27, 2020, 5:06pm UTC](https://discourse.julialang.org/t/matrix-input/43776/1 "2020-07-27T17:06:51Z")

</div>

If I have a matrix input:  
A=[. . . 25;  
12 . . .]  
dots mean that there are no value for that i-j combination. Zeros are not appropriate since the inputs will be used for division.  
Are the dots interpreted as non-existance of i-j combination, or there is another way to declare this matrix?  
Thanks.

---

<div class="post-metadata">

**Author:** ![pdeffebach](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pdeffebach/32/10320_2.png) [@pdeffebach](https://discourse.julialang.org/u/pdeffebach)\
**Post date:** [July 27, 2020, 5:07pm UTC](https://discourse.julialang.org/t/matrix-input/43776/2 "2020-07-27T17:07:59Z")

</div>

using `missing` as a value here

---

<div class="post-metadata">

**Author:** ![mamo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mamo/32/25591_2.png) [@mamo](https://discourse.julialang.org/u/mamo)\
**Post date:** [July 27, 2020, 5:16pm UTC](https://discourse.julialang.org/t/matrix-input/43776/3 "2020-07-27T17:16:46Z")

</div>

Thank you!