MATLAB Answers

how to read specified letters from ascii file

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i want prgrm that reads ascii file but only the letters 'a' to 'z' using ascii code 97:122 and i want to put those letters in new file and save them

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Rik
Rik on 2 Jul 2020
Why don't you try one of the examples in the documentation, or one of the files on the File Exchange, or one of the hundreds of examples you can find with Google/Yahoo/duckduckgo/Bing?
narimen boucenna
narimen boucenna on 2 Jul 2020
i did actually nothing that i could find usefull
Rik
Rik on 2 Jul 2020
I just googled 'read ascii text file to char array matlab'. The top 3 results all suggest the fileread function.

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Accepted Answer

Benjamin
Benjamin on 2 Jul 2020
inputFileName = 'C:\input.txt';
outputFileName = 'C:\output.txt';
fileID = fopen(inputFileName,'r');
A = fread(fileID,'*char');
fclose(fileID);
A = A(A >= 97 & A <= 122); % using logical indexing to keep only 'a' to 'z'
fileID = fopen(outputFileName,'w');
fprintf(fileID,'%s',A);
fclose(fileID);

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Walter Roberson
Walter Roberson on 2 Jul 2020
We recommend against providing complete solutions for homework problems.
narimen boucenna
narimen boucenna on 3 Jul 2020
thnx for the progrm it really helped me when i opend the new file i found what i was looking for

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More Answers (1)

Image Analyst
Image Analyst on 2 Jul 2020
Try this:
% chr = fileread('test1.m') % Whatever file you want to read in.
chr = '123456abcdef ABCDEF 789.' % String for testing.
TF = isstrprop(chr,'alpha')
newChr = chr(TF)

  2 Comments

Walter Roberson
Walter Roberson on 2 Jul 2020
This will grab upper case as well as lower case.
narimen boucenna
narimen boucenna on 3 Jul 2020
unfortunately it didnt work the result was
abcdefABCDEF
and its not what i was looking for but thnx for the help i really appreciate it

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