Convert a string to number

2014 2 5
2 个回答
回答已采纳
更新时间：2014 2 6
16 次查看（30 天）

0 个投票

Hi, I want to convert a string into a number however I don't want to use str2num since I loose extra digits (see example below). Can I use some other MATLAB function?
data = 0.0782238;
s = str2num(data); %Don't want this since s = 0.0782 and I'm loosing three extra digits

4 个评论
显示 2更早的评论 隐藏 2更早的评论

Patrik Ek
Patrik Ek 2014-2-5
Are you sure? It could just be matlabs display. Try
format long
Lily
Lily 2014-2-5
ok, so MATLAB will store the value but shortens the display? ;)
Patrik Ek
Patrik Ek 2014-2-5
Exactly. You could try
a=1.1111111;
a
b=2.2222222;
format long;
a+b
Lily
Lily 2014-2-6
nice, thx :)

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2014-2-5

1 个投票

str2num() does not lose those extra digits. Instead, you are not displaying the full width of the number. At the MATLAB command line give the command
format long g
and try your code again.

更多回答（1 个）

Wayne King
Wayne King 2014-2-5
编辑：Wayne King 2014-2-5

0 个投票

how about just using format long
data = '0.0782238';
data = str2num(data);
format long
data

类别

在 帮助中心 和 File Exchange 中查找有关 Data Type Conversion 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by