how to convert a string to a vector

2015 12 1
1 个回答
更新时间：2015 12 8
35 次查看（30 天）

0 个投票

Hi I have a string chain and wish to convert it into a vector So if my input is: x =1,3,3,4,5,6,6 I need an output
y = [1 3 3 4 5 6 6] How do I do this?

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回答（1 个）

per isakson
per isakson 2015-12-1
编辑：per isakson 2015-12-1

1 个投票

One way
>> str ='1,3,3,4,5,6,6'
str =
1,3,3,4,5,6,6
>> num = textscan( str, '%f', 'Delimiter',',' )
num =
[7x1 double]
and together with the missing step
str ='1,3,3,4,5,6,6';
num = textscan( str, '%f', 'Delimiter',',' );
num = permute( num{1}, [2,1] )
num =
1 3 3 4 5 6 6
another way
>> str2num( str )
ans =
1 3 3 4 5 6 6

7 个评论
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lamghari
lamghari 2015-12-1
I have the result in the form of columns
Walter Roberson
Walter Roberson 2015-12-2
Are you indicating that your input is a string that has newlines and words like "Columns 326 through 338" inside it, or are you discussing what the output looks like after textscan or str2num?
If your input is a string like that, "Don't do that", get access to the original data instead.
lamghari
lamghari 2015-12-3
编辑：per isakson 2015-12-3
No, i am discussing what the output looks like after str2num my input is for example:
6,7,6,6,6,6,6,5,4,4,4,4,3,4,4,4,4,4,5,5,4,5,5,5,6,5,6,6,6,6,6,5,5,4,4,5,4,4,5,4,4,4,4,4,4,4,4,3,4,4,3,6,6,1,0,0,7,0,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,0,0,7,6,7,7,6,5,1,0,0,0,0,0,0,1,0,0,0,0,1,0,1,1,1,1,1,2,1,2,2,3,2,2,3,3,3,4,3,2,2,2,2,2,3,2
lamghari
lamghari 2015-12-3
编辑：per isakson 2015-12-3
i need an output:
y = [6 7 6 6 6 6 6 5 4 4 4 4 3 4 4 4 4 4 5 5 4 5 5 5 6 5 6 6 6 6 6 5 5 4 4 5 4 4 5 4 4 4 4 4 4 4 4 3 4 4 3 6 6 1 0 0 7 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 0 7 6 7 7 6 5 1 0 0 0 0 0 0 1 0 0 0 0 1 0 1 1 1 1 1 2 1 2 2 3 2 2 3 3 3 4 3 2 2 2 2 2 3 2]
per isakson
per isakson 2015-12-3
"How do I do this?" &nbsp The short answer is: You cannot do that. And that's because
y = [6 7 6 6 6 6 6 5 4 4 4 4 ... ]
isn't a display format. It's an example of an assignment of a numerical vector to a variable, y
lamghari
lamghari 2015-12-8
ok.thank you very much
Walter Roberson
Walter Roberson 2015-12-8
output = ['y = [', regexprep(num, ',', ' '), ']' ];
If what you want is the string 'y = [6 7 6 6 6 6 6 5 4 4 4 4 ... ]'

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