How do I add space between strings when I am using randperm?

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Elisa
Elisa 2013-10-2
评论： Sean de Wolski 2013-10-4
Sorry, I'm not expert but I'm learning.
I've tried some answer regarding how to add space between strings, but it seems that these methods do not apply when using a random generation of string.
If I use matrix concatenation (horzcat): ['A', ' ', 'B'] it will generate the space randomly.
if I use STRCAT then it give me error 'index exceed size of matrix' whatever I do.
This is my code:
string = ['BCDFGHKJLMNPQRSTVWXYZ'];
numRands = length(string);
set_length = 5;
set_string = string( round(randperm(21,set_length))); %21 consonants
Thanks a lot in advance for any help you might provide!
  2 个评论
Walter Roberson
Walter Roberson 2013-10-2
randperm(21, set_length) is going to produce a list of integers. There is no point in round()'ing the integers before using them as indices.

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采纳的回答

Walter Roberson
Walter Roberson 2013-10-2
There is a trick to using strcat() to add a space: strcat() will disregard leading or trailing spaces on strings, but will not do so for a cell array of strings. So you can use
set_string1 = string( round(randperm(21,set_length)));
set_string2 = string( round(randperm(21,set_length)));
strcat(set_string1, {' '}, set_string2)
Or, considering that set_string1 and set_string2 are just simple vector of character,
[set_string1, ' ', set_string2]
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Walter Roberson
Walter Roberson 2013-10-3
Please show how you create the string and put it into the static text.
Elisa
Elisa 2013-10-3
thanks a lot Walter. Now, I've solved it!
I needed to define that your code is in fact my variable:
string = 'BCDFGHJKLMNPQRSTVWXYZ';
numRands = length(string);
set_length = 5;
set_string = string( randperm(21,set_length)); %21 consonants
set_string = reshape([set_string; blanks(set_length)], 1, []);
set(handles.show_set_string_inStaticTextInGUI,'String',set_string);
Thanks a lot!!!!!!

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更多回答（1 个）

Sean de Wolski
Sean de Wolski 2013-10-3
You could also do this with strjoin (13a or newer)
string = ['BCDFGHKJLMNPQRSTVWXYZ'];
numRands = length(string);
set_length = 5;
set_string = strjoin(cellstr(string(randperm(21,set_length)).').',' ');
  2 个评论
Elisa
Elisa 2013-10-3
Thanks a lot Sean, but this give me error
Undefined function 'strjoin' for input arguments of type 'cell'.
Anyway, I solved it with Walter method.
Thanks a lot anyway!!! I've learned a lot of new things :)

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