sparse matrix with higher than double precision

3 次查看（过去 30 天）
Jacob Bresler
Jacob Bresler 2016-8-1
编辑： Thorsten 2016-8-1
hey guys, so I am currently working on a problem where all of my matrices are banded, but I am using the symbolic toolbox to set my floating point precision higher than that of double (I kind of have to since some of the numbers I am dealing with are really small). The issue with this is that you can't turn a sym array into a sparse matrix since matlab doesn't seem to allow that. does anyone have any suggestions?
  1 个评论
Stephen23
Stephen23 2016-8-1
编辑：Stephen23 2016-8-1
"some of the numbers I am dealing with are really small"
What order and how many digits ?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

José-Luis
José-Luis 2016-8-1
编辑：Thorsten 2016-8-1
The number of significant digits that you can store in a double is what limits things. As such, the smallness of the number doesn't really matter unless the values in your array span many orders of magnitudes and you need to keep more than (around) 15 digits.
If 15 significant digits is enough for you, you could always scale them, keep an index of the scaled numbers, and store as a double in a sparse array.
Please note that I don't have the symbolic math toolbox and I am taking you to your word that a sparse symbolic array cannot be generated.

类别

在 Help Center 和 File Exchange 中查找有关 Sparse Matrices 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by