Showing : At least one END is missing: the statement may begin here.

I am trying to run this code but getting the mentioned error:

I tried to indent the code with smart ident but it is not working either! solution suggested for this kind of error.

rng (42);
s = randi ([0, 3], 1, 100000);
dlmwrite ( 'random_4.txt' , s, ',' );
 
rng (42);
s = randi ([0, 1], 1, 100000);
dlmwrite ( 'random_1.txt' , s, ',' );
 
rng (42 * 42);
s = randn (1, 100000);
dlmwrite ( 'randn_seed4242.txt' , s, ',' );

>> create_random_data

Error: File: rng.m Line: 6 Column: 1

At least one END is missing: the statement may begin here.

Error in create_random_data (line 3)

rng (42);

[Jacob Wood]

Is it possible the file rng.m has been edited? Your code works for me.

[Image Analyst]

Line 6 is

s = randi ([0, 1], 1, 100000);

not rng(42), so please attach the m-file with the paper clip icon so we can see the real script.

[Yulia M]

file has been attached!

[Yulia M]

@jacob Wood no code has not been edited.

[Jacob Wood]

When I run the attached create_random_data.m the only error I get is this:

Error using dlmwrite (line 104)
,  is not a valid attribute or delimiter. Delimiter must be a single character.

Error in Untitled (line 5)
dlmwrite('random_4.txt', s, ', ');

This is caused by the space after the commas in all your dlmwrite calls. Just leave the comma in there, dlmwrite can only use single character delimiters. The code functions properly after that edit for me.

However, your function rng() is overwriting Matlab's built-in rng() and is the reason the code is breaking for you. You either need to delete this rng.m file and use Matlab's rng(), or use proper syntax in defining your rng(). The error you are seeing is because Matlab expects to see the keyword "end" at the end of your if statements and function definitions, not "endif" or "endfunction".

[Yulia M]

@jacob Wood thank you it was the problem you specified it helped me a lot.

Answer 1

[the cyclist]

The last line of rng.m is

endfunction

but it should be just

end

I also spotted another problem, which is that you should have

end % this is correct MATLAB syntax

instead of

endif % this is not correct MATLAB syntax

You are then going to encounter a new error:

Error using horzcat
Dimensions of arrays being concatenated are not consistent.

Error in rng (line 4)
state = [state_n, state_i];

Error in create_random_data (line 3)
rng(42);

but it is not perfectly clear to me what you are trying to do there, so I suggest you try to solve that one on your own, and post a new question if you get stuck.

Answer 2

[Manjunath]

% To find autocorrelation of the given sequence using formula 
x=input('Type in the sequence: '); 
maxlag=2*length(x)-1;
autocor_x=[]; 
lag_save=[]; 
len=length(x);
for lag=-(len-1):(len-1) 
    lag_save=[lag_save,lag];
    xshifted=[]; 
    xmodified=[]; 
    r=0;
    if(lag<=-1)
        temp_lag=lag.*-1; 
        xshifted=[x,zeros(1,temp_lag)]; 
        xmod=[zeros(1,temp_lag),x];
    end 
    if(lag>=1)
        xshifted=[zeros(1,lag),x]; 
        xmod=[x,zeros(1,lag)];
    end
    if(lag==0)
        xshifted=x; 
        xmod=x;
        for k=1:length(xshifted) r=r+xshifted(k)*xmod (k);
        end 
        autocor_x=[autocor_x,r];
    end
    disp(['The number of lags: ',num2str(maxlag)]);
    disp(['The autocorrelation of given sequence:',num2str(autocor_x)]);
    disp(['The lags:',num2str(lag_save)]); 
    stem(lag_save,autocor_x);
    xlabel('Lag index'); 
    ylabel('Amplitude') 
    title('Autocorrelation');

[Steven Lord]

When I copied your code into the MATLAB Editor and smart indented the code, the for statement on line 7 does not have a corresponding end statement lined up with it. Adding that end at the end of the code eliminated the red Code Analyzer error message, though a few orange Code Analyzer warning messages remained.