Convert single to double

Question

Ana Gonçalves 2022-10-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1836948-convert-single-to-double

编辑： Frederic Rudawski 2022-10-27

I have 1x18007 single, and it has a certain range (which is not the real range), and I need to convert it to double, to get the actual values.

PS.: typecast doesn't work.

>> a = typecast(driverAppliedTorqueAtSteeringWheel, 'double');

Error using typecast

The first input must contain a multiple of 2 elements to convert from single (32 bits) to

double (64 bits).

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

James Tursa 2022-10-27

编辑：James Tursa 2022-10-27

"... I need to convert it to double, to get the actual values ..."

This doesn't make any sense to me. Converting singles to doubles will result in exactly the same value since doubles can represent every single exactly, just in a different bit representation format. Please explain what you mean by "actual values." Maybe you can give a few examples of single values and what double values you think they should be converted to.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Frederic Rudawski 2022-10-27

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1836948-convert-single-to-double#answer_1084888

编辑：Frederic Rudawski 2022-10-27

My first guess would be:

a = double(driverAppliedTorqueAtSteeringWheel)

But you probably have to adjust the range yourself.

EDIT:

The problem with typecast is, that you need 2 singles to create one double, so you need to fill the missing information with addiditional singles, e.g.:

data = single([1;2;3;4;5])

b = single(zeros(size(data)));

M = [b data]';

newdata = M(:)

a = typecast(newdata,'double')