How to read and scan a text file

Hi all

Currently counting the number of vowels with a program but can not get my text file to open and be read by the script. I feel im missing something simple or my program is just completely wrong.

this is what i have.

inputfile = fileread('SampleText.txt');
Number_of_vowels = vowelcounts(s);  
function w = vowelcounts(s)       
w=0;
l=length(s);
for i=1:l
if s(i)=='a' || s(i)=='e' || s(i)=='i' || s(i)=='o' || s(i)=='u'
    w=w+1;
else 
    continue
end
end
end

and this is the error

>> Vowel_count(SampleText.txt)

Unable to resolve the name SampleText.txt.

the program nees to display at the end "This file contains ... vowels."

any help is greatly apprecieted thanks.

[KSSV]

Show us how your file is. Attach an example file. It can be done without loop as well.

[Stephen23]

No loop required:

S = fileread('SampleText.txt');
N = nnz(ismember(lower(S),'aeiou'))

Answer 1

[DGM]

Attached is an example file:

inputfile = fileread('SampleText.txt'); % make sure file exists?

Number_of_vowels = vowelcounts(inputfile) % original

Number_of_vowels = 96

Number_of_vowels = vowelcounts2(inputfile) % simplified

Number_of_vowels = 96

function w = vowelcounts(s)
	w=0;
	l=length(s);
	for i=1:l
		if s(i)=='a' || s(i)=='e' || s(i)=='i' || s(i)=='o' || s(i)=='u'
			w=w+1;
		else
			continue
		end

	end
end

function w = vowelcounts2(s)
	w = sum(ismember(lower(s),['a' 'e' 'i' 'o' 'u']));
end

[Ben Hischar]

Thanks alot for that DGM, I need to also print that to a sperate file and highlight each vowel that came out. For example:

This file contains xxx vowels.

'a e i o u' (appear on the lines below)

i forgot to mention that in my question

[Ben Hischar]

@DGM

[DGM]

Sorry. I missed the prior notification. Things get buried too easily in this new system.

I'm not quite sure what exactly you're asking for, but let's start with this (I've changed the sample file):

inputfile = fileread('SampleText.txt'); % make sure file exists?
inputfile = split(inputfile,char(10)); % split on newline (version-agnostic)

% vowel count per line
vcl = cell2mat(cellfun(@vowelcounts,inputfile,'uniform',false));
vctotal = sum(vcl);

vowellines = inputfile(vcl>0);
nvl = numel(vowellines);

novowellines = inputfile(vcl==0);
nnvl = numel(novowellines);

% do output
fprintf('This file contains %d vowels in total\n',vctotal);

This file contains 101 vowels in total

fprintf('The following %d lines contain vowels:\n',nvl)

The following 5 lines contain vowels:

for l = 1:nvl
	fprintf('\t%s\n',vowellines{l})
end

	The conscious and intelligent manipulation of the organized habits and 
	opinions of the masses is an important element in democratic society.  
	Those who manipulate this unseen mechanism of society constitute an invisible 
	government which is the true ruling power of our country.  -- Bernays, 1928
	kelalksjdlk4iaa

fprintf('The following %d lines contain no vowels:\n',nvl)

The following 5 lines contain no vowels:

for l = 1:nnvl
	fprintf('\t%s\n',novowellines{l})
end

	
	zzxr44zkzkzkzlzlzkkzklzkjzlkzjlkjzxczxcjzlkjxclkzjxclkzjxclk
	zlxjclzkjxc
	zxlcjzlxkcj
	klljzlkcx
	
	

% this is the same function renamed
function w = vowelcounts(s)
	w = sum(ismember(lower(s),['a' 'e' 'i' 'o' 'u']));
end

That lists lines containing vowels and lines containing no vowels. I did that simply for sake of clarity. You can use just the part you need. That said, if you want each instance of a vowel highlighted on each line, that gets quite a bit more complicated.

If you want to dump the output to a file instead of to console, you can do that too:

% dump to a file instead
fid = fopen('outputfile.txt','w');
fprintf(fid,'This file contains %d vowels in total\n',vctotal);
fprintf(fid,'The following %d lines contain vowels:\n',nvl);
for l = 1:nvl
	fprintf(fid,'\t%s\n',vowellines{l});
end
fclose(fid);

Answer 2

[Chunru]

s = fileread('SampleText.txt');
Number_of_vowels = vowelcounts(s);
fprintf('Number of vowels: %d\n', Number_of_vowels);

Number of vowels: 12

function w = vowelcounts(s)
w=0;
l=length(s);
for i=1:l
    if s(i)=='a' || s(i)=='e' || s(i)=='i' || s(i)=='o' || s(i)=='u'
        w=w+1;
    else
        continue
    end
end
end