Why does Matlab give me the entire string instead of just one element?
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Hi, I'm trying to extract a value of a string, but if I type string(1) Matlab gives me the entire string.. How should I solve this?
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YT
2018년 9월 6일
mystring = "HelloWorld"; %notice double quotes
mychar = 'HelloWorld'; %notice single quotes
mystring(1)
%Output: HelloWorld
mychar(1)
%Output: H
string2char = char(mystring);
string2char(1)
%Output: H
As you can see you can easily make a char array from a string like this
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YT
2018년 9월 6일
Something like this then
input = "987654"; %input string
temp = char(input); %temporary variabele
output = temp(1) %will output '9' of type char
ADragon
2018년 9월 6일
I am guessing you might have a cell array instead of a string. What happens when you do this?
str = 'Hello Matlab';
str(1)
It should return 'H'. If you have a cell array it will return the whole string. For example:
c = {'Hello Matlab'};
c(1)
To get the first character use
c{1}(1)
which is first cell, first element of cell array c.
AD
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ADragon
2018년 9월 6일
That stinks. Your teacher must be after something very specific. I would check docs for the functions that you CAN use. I'm not sure how to do what you are asking without functions.
Walter Roberson
2018년 9월 7일
Brace indexing is not supported for variables of this type
That establishes that your input is not a cell array of character vectors, and also establishes that your input is not a string object.
If your input were a character vector then using (1) to index it would have only returned a single character instead of the whole thing.
I therefore suspect that you are not being given a cell array or a character vector or a string object. I suspect that you are being passed a numeric object. What shows up if you ask for
class(NameOfVariableGoesHere)
?
Image Analyst
2018년 9월 7일
It's probably because string is a built-in function name. Use a different name for your variable. From the help for the string() function:
Description
example
str = string(A) converts the input array to a string array.
For example:
>> string(1)
ans =
"1"
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