convert class 'char' to class 'logical' , How?

47 次查看（过去 30 天）
Furqan Haider
Furqan Haider 2014-1-17
编辑： Stephen23 2024-3-6
I have some binary bits in a string of class 'char':
b= 10001010101010101000000111110000111
I wish to covert class of 'b' from 'char' to 'logical'.
When i use str2num function, it considers all the bits as a single number and returns me
str2num(b)
ans =
1.0001e+034
Which i don't want. i want b as a logical array.
Kindly Help.

请先登录，再回答此问题。

采纳的回答

Mischa Kim
Mischa Kim 2014-1-17
Try
b_bin = logical(b(:)'-'0')
  7 个评论
显示 5更早的评论
Thushara
Thushara 2024-3-6
编辑：Thushara 2024-3-6
"b_bin = logical(b(:)'-'0')"
Why this is not indicated in the Documentation for 'logical' function?
Stephen23
Stephen23 2024-3-6
编辑：Stephen23 2024-3-6
"Why this is not indicated in the Documentation for 'logical' function?"
It already is: it states at the very top "logical(A) converts A into an array of logical values. Any nonzero element of A is converted to logical 1 (true) and zeros are converted to logical 0 (false)", which is exactly what happens here.
Of course the LOGICAL documentation cannot cover every possible way that you might create the input array (you did not consider that there are many many many many other ways of creating the input array and there is nothing special about this particular way so your proposal would mean including basically a very large subset of the entire MATLAB documentation on every single MATLAB documentation page... such documentation would be truly very large and very difficult to find anything in).

请先登录，再进行评论。

更多回答（2 个）

William Prophet
William Prophet 2016-11-11
If you want to convert the character array to a logical one, just compare the entire array character by character. So if you have '001011' and you want to return [0 0 1 0 1 1], just do
'001011' == '1'
And then every character in the array is compared to '1'.
Andreas Goser
Andreas Goser 2014-1-17
Logical can only hold 0 or 1, so 10001010101010101000000111110000111 is not possible. Maybe you want binary numbers?
  2 个评论
Furqan Haider
Furqan Haider 2014-1-17
yes, you are right, binary holds 0 and 1, but i have a variable 'b' of class 'char' , i want to separate its elements and put them in a logical or 'double' class array.
How can I get it,
Kindly help
Furqan Haider
Furqan Haider 2014-1-17
as i have already stated that class of variable 'b' is 'char',
b= ['10001010101010101000000111110000111']

请先登录，再进行评论。

类别

在 Help Center 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