MATLAB: Create a new pattern with a string

strings

i have a string pattern as below of length 24

 str1 = 'AAAAAABBBBBBCCCCCCDDDDDD'

now i want to create a new pattern from the str1 with the length i give,

if i give length of new pattern as 72 answer should be

str2 = 'AAAAAABBBBBBCCCCCCDDDDDDAAAAAABBBBBBCCCCCCDDDDDDAAAAAABBBBBBCCCCCCDDDDDD'

that is it should repeat pattern in str1 upto the limit i want

if i give 84 answer should be

str3 = 'AAAAAABBBBBBCCCCCCDDDDDDAAAAAABBBBBBCCCCCCDDDDDDAAAAAABBBBBBCCCCCCDDDDDDAAAAAABBBBBB'

Best Answer

m = 84;
[s,~,c] = unique(str1,'stable');
n = numel(c);
out = s(c(rem(0:m-1,n)+1));

m = 84;
k = repmat(str1,1,ceil(m/numel(str1)));
out = k(1:m);

Related Solutions

MATLAB: How to count the no of words in a sentence

txt = fileread('hello.txt');  %read in file, assuming it is not too big
sentences = strtrim(regexp(txt, '[\.\?\!]+', 'split'));  %split into sentences
%I assume that sentences end with ., ?, or !, which don't appear elsewhere in 
% the file (i.e., no quoted strings, abbreviations containing '.', etc.).
words = regexp(sentences, '\s+', 'start');  % find spaces (which separate words)
wordsPerSentence = cellfun(@length, words, 'UniformOutput', true);  %count words
%we only care about sentences containing at least one word.
wordsPerSentence = wordsPerSentence(wordsPerSentence>=1)+1;

MATLAB: Create a Matrix with multiple repeated strings

F = [repmat(str1, 1, 3), repmat(str2, 1, 6), repmat(str3, 1, 12)];

In the special case where your items are all only single characters,

F = repelem([str1, str2, str3], [3 6 12]);

Both of these would produce 'aaabbbbbbcccccccccccc' .

But possibly you want

F = [repmat({str1}, 1, 3), repmat({str2}, 1, 6), repmat({str3}, 1, 12)];

F = repelem([{str1}, {str2}, {str3}], [3 6 12])'

if your desired answer is

   'a'    'a'    'a'    'b'    'b'    'b'    'b'    'b'    'b'    'c'    'c'    'c'    'c'    'c'    'c'    'c'    'c'    'c'    'c'    'c'    'c'

If you have R2016b or R2017a and have constructed your items as string objects, like (R2017a or later)

str1 = "a"; str2 = "b"; str3 = "c";

then you can use

F = repelem([str1, str2, str3], [3 6 12]);

if your desired output is

"a"    "a"    "a"    "b"    "b"    "b"    "b"    "b"    "b"    "c"    "c"    "c"    "c"    "c"    "c"    "c"    "c"    "c"    "c"    "c"    "c"

and you can use

F = strjoin( repelem([str1, str2, str3], [3 6 12]), '' );

if your desired output is "aaabbbbbbcccccccccccc"

Best Answer

Related Solutions

MATLAB: How to count the no of words in a sentence

MATLAB: Create a Matrix with multiple repeated strings

Related Question