I have more than 10k text files look similar like this, all of them are similar in format but not in size, sometime is bigger or smaller.
[code][{u'language': u'english', u'area': 3825.8953168044045, u'class': u'machine printed', u'utf8_string': u'troia', u'image_id': 428035, u'box': [426.42422762784093, 225.33333055900806, 75.15151515151516, 50.909090909090864], u'legibility': u'legible', u'id': 1056659}, {u'language': u'na', u'area': 24201.285583103767, u'id': 1056660, u'image_id': 428035, u'box': [223.99998520359847, 249.57575480143228, 172.12121212121215, 140.6060606060606], u'legibility': u'illegible', u'class': u'machine printed'}] [/code] I want to extract two changeable variable in every text using regular expression.

The output should be like this
[code]box = [223.99998520359847, 249.57575480143228, 172.12121212121215, 140.6060606060606] box1 = .. sometime there is more than one [/code] & second output
[code]word = troia word1 = ... sometime there is more than one word [/code] My code 1: for the word extraction
[code]fid = fopen('text1.txt','r'); C = textscan(fid, '%s','Delimiter',''); fclose(fid); C = C{:}; Lia = ~cellfun(@isempty, strfind(C,'utf8_string')); output = [C{find(Lia)}]; expression = 'u''utf8_string'': u+' matchStr = regexp(output, expression,'match');[/code] My code 1 result give me only the
[code]utf8_string[/code] My code 2: for the box number extraction
[code]s = sprintf('text_.txt'); fid = fopen(s); tline = fgetl(fid); C = regexp(tline,'u''box'': +\[([0-9\. ,]+)\]','tokens'); C = cellfun(@(x) x{1},C,'UniformOutput',false)'; M = cell2mat(cellfun(@(x) x', cat(1,C2{:}),'UniformOutput',false));[/code] This code 2 is running but not with every text something i got this error
[code]Error using cat Dimensions of matrices being concatenated are not consistent[/code] Small Bio