How to convert character column to 4 byte (total 32 bits) data?

Question

Dohee Kim 2022-8-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1778050-how-to-convert-character-column-to-4-byte-total-32-bits-data

回答： David Hill 2022-8-11

Status.mat

Hi, Thank you fo much for get interest in this,

I have a numbers indicating instrument status in timetable.

For example, now it looks like this:

Time Var1

20220804 00:00:01 15226547

20220804 00:00:02 3226557

... ....

These numbers in Var1 (possibly characters, since my instrument manual saids it as 'words') should be 4 bytes and each byte has 8 bits that includes different information as 1 or 0 respectively. So in total I should have 32 digits of 1s and 0s (like binary form).

What I want to get is:

Time Var1 Bit1 Bit2 Bit3 Bit4 ... Bit 32

20220804 00:00:01 15226547 1 0 1 0 1

20220804 00:00:02 3226557 0 0 1 0 1

... .... ....

(FYI, I believe first row should be look like 00100100 according to actual instrument setup.)

I tried to change this Var1 numbers in 32digit binary form, but it seems not the correct way.

Also I tried some functions like typecast, uint32, and so on... but it is hard to figure out..

I attached Status.mat file.

Do you have any idea to solve this out?

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Answer 1

David Hill 2022-8-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1778050-how-to-convert-character-column-to-4-byte-total-32-bits-data#answer_1025205

在 MATLAB Online 中打开

dec2bin(15226547,32)-'0'
ans = 1×32
     0     0     0     0     0     0     0     0     1     1     1     0     1     0     0     0     0     1     0     1     0     1     1     0     1     0     1     1     0     0