Error in saving variable as txt file

I have a variable 'result' of size 170 rows and 1024 columns. I want to save this as txt file with each column separated by tab. Any ideas

path = 'E:\Data\fault\300';
s = what(path);
matfiles = s.mat; 
l = numel(matfiles);
for a = 1:l
    file = fullfile(path,char(matfiles(a)));
    load(file);
    result(:,a) = signal(1:1024);
end
save('300_faults.txt','result');

the text in the file appears to be not understandable

   MATLAB 5.0 MAT-file, Platform: PCWIN64, Created on: Thu Mar 02 11:55:20 2017 
   xœ,Wy4Þ÷5TJdh@¨$Q!$⃣’±&copy;(¤”1d&trade;2Ï2{fÞ{<ó3ÏÓI„$c†D†Dƒ)•”äç»ÖïÞu×^÷&reg;»Îçî{ÎÞ{hhhÄž1ÓìØÂ[ëø¿±ýÿ÷4Ûhhl·€vk>ÞÂ]ÿ;Ûº¯zf³ã^;  ؽ…ž8Ä`¸„CÄb6„´ƒE¾\âð|š….t¶þ.N‰ødÀ+e”‚çùÎ5gJèa¤ûµÑgrànýŠOf1ôžÉ`ã'd¦càM¶p¼ñàïÍÝ~&trade;¸]´œ?Ù-
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Answer 1

[KSSV]

Try

   save 300_faults.txt result -ascii