MATLAB: Error: This statement is incomplete.

MATLABPHP

Hello everyone! I've made this function on Matlab and I want to input variables to it from my php table-page.The problem is that I get the error above when i call it (even though it works perfectly manually). Can anyone see where the problem is?
(Iam giving the matlab code, the php code and the error below). Thank you in Advance, for your time!
Error:
Matlab code:
function knn_func(dataset,fromvar,tovar,k)
Dataset=dataset;
Fromvar=fromvar;
Tovar=tovar;
if Dataset==1  
z = readtable('loans.txt');
z = table2array(z(:,2:5));
c=double(z(:,4));
end
if  Dataset==2 
z = readtable('floweriris.txt');
z = table2array(z(:,2:9));
c=double(z(:,8));
end 
if   Dataset==3
z = readtable('decks.txt');
z = table2array(z(:,2:7));
c=double(z(:,6));
end
if   Dataset==4
z = readtable('fishiris.txt');
z = table2array(z(:,2:5));
c=double(z(:,4));
end
x=double(z(:,Fromvar));
y=double(z(:,Tovar));
plot(x,y,'b.','linewidth',2);
xlabel('x');
ylabel('y');
title('Income Dataset');
hold on;
m=[];
k1=k;
pos = randi(length(x));
for i=1:length(x)
    if(c(i)==0)
        plot(x(i),y(i),'r+','linewidth',4);
    else
        plot(x(i),y(i),'g+','linewidth',4)
    end
    hold on;
end
distance=[];
for i=1:length(x)
    e=sqrt((x(i))^2+(y(i))^2);
    distance=[distance e];
end
temp=0;
gemp=0;
for i=1:length(distance)
    for j=1:(length(distance)-i)
        if(distance(j)>distance(j+1))
            temp=distance(j);
            distance(j)=distance(j+1);
            distance(j+1)=temp;
            gemp=c(j);
            c(j)=c(j+1);
            c(j+1)=gemp;
        end
    end
end
classy=[];
freq0=0;
freq1=0;
for i=1:k
    classy=[classy c(i)];
    if(c(i)==0)
        freq0=freq0+(1/distance(i));
    else
        freq1=freq1+(1/distance(i));
    end
end
if(freq0==freq1)
output=mode(classy);
elseif(freq0>freq1)
    output=0;
else
    output=1;
end
;
xlabel('x');
ylabel('y');
title('knn classification on Income data');
end
PhP Code:
       <?php
            if (isset($_POST['submit-btn'])) {
                echo 'submitted'; 
            $id = $_POST['id']; 
            $dataset = $_POST['dataset'];
            $fromvar =$_POST['fromvar']; 
            $tovar = $_POST['tovar']; 
            $algorithm = $_POST['algorithm']; 
            $k = $_POST['k']; 
    $inputDir  = "F:\MATLAB\matlab2020\bin\matlab.exe";
    $NameofAlg = $algorithm;
    if($NameofAlg == "1") {
    $command = "matlab -sd ".$inputDir." -r knn_func(".$dataset.", ".$fromvar.", ".$tovar.",".$k.")"; }
    else{
    $command = "matlab -sd ".$inputDir." -r kmeans_func(".$dataset.", ".$fromvar.", ".$tovar.",".$k.")"; }
 echo($command);
 exec($command); 
}      
?>

Best Answer

So the command that's being executed looks like it is:
submittedmatlab -sd F:\MATLAB\matlab2020\bin\matlab.exe -r knn_func(1, 1, 1,1)
I understand why you're receiving this error, but there's also another thing odd about this command.
Assuming submittedmatlab is a command to launch MATLAB using the executable and pass some startup options into it, the value for the -sd option should be the directory in which MATLAB should start rather than the full path of the executable.
The value that's being specified for the -r startup option as the code to be executed is "knn_func(1," [quotes added to distinguish where the command ends from where the sentence ends.]. The space ends the command since it is not enclosed in quotes. Try wrapping that call in quotes as per the example for the -r option using disp on this documentation page. Alternately you might want to use the -batch option instead (with the quotes as well.)
submittedmatlab -sd F:\MATLAB\matlab2020\bin\matlab.exe -r 'knn_func(1, 1, 1,1)'
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