Why to use vpa instead of double in dealing with symbolic variables?

6 次查看（过去 30 天）
Amit Kumar
Amit Kumar 2014-1-29
回答： Sean de Wolski 2014-1-29
Hello, I have a matrix in symbolic form and I want to convert it or display it as float. How to do this? Here is my simple code:
syms X Y
F=[(50*Y)/3 + 127/120, (50*X)/3 + 31/1000;54*Y - 319/600, 54*X + 917/1000];
double(F)
However matlab gives error for last line and I have to use vpa. I don't want to display F as having fractions, so I want to convert it to float. Anyone having any comments?

请先登录，再回答此问题。

采纳的回答

Sean de Wolski
Sean de Wolski 2014-1-29
For display
vpa(F,5)
You can't convert it to double because X and Y are symbolic. To convert it to double, you would first have to use subs to substitute values for X and Y.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Numbers and Precision 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