MATLAB: Matlab coder error

matlab coder

i tried to convert a function from matlab to c. the function,s part accounting for error is:_

>> a=input('code no');
   if (a == 1)
    disp(' ');       >>

the error in code generation report screen reads:-

Expected either a logical, char, int, fi, single, or double. Found a MATLAB type. MATLAB types are returned from calls to the MATLAB interpreter and are not supported inside expressions. They may only be used on the right-hand side of assignments and as arguments to MATLAB calls.

how to avoid such error while convertion.

Best Answer

input() evaluates what the user enters and so could return any arbitrary MATLAB type.

Possibly you might need to input a string and convert the string to a number.

Related Solutions

MATLAB: Matlab Coder – Create DLL

When arguments are passed by pointer, loadlibrary creates extra output arguments for them. The third bullet at:

http://www.mathworks.com/help/matlab/matlab_external/passing-arguments-to-shared-library-functions.html#f48607

describes this more.

MATLAB Coder will generate a C function with a signature like:

void Test(double A, double B, double *C, double *D);

where the arguments C and D hold the return values after the call. C does not support returning multiple arguments like MATLAB, so multiple return values must be accomplished by using output reference arguments.

If you are going to use the code in MATLAB, generating a MEX function would make calling the generated code simpler. The generated MEX would be invoked as any other MATLAB function.

You could also generate a MEX function that calls your generated DLL using coder.ceval. There is an example in the documentation that shows how to do this.

MATLAB: Repeating a sequence of code

Do you mean this?

n = 1;
while n ~= 3
    disp(' Choose an Option Below ');
    disp(' 1 Convert Decimal Number to Binary Number');
    disp(' 2 Convert Binary Number to Decimal Number');
    disp(' 3 Exit');
    n = input(' Enter Option Number You Desire: ');
    switch n 
        case 1 
            fprintf(' Convert Decimal Number to Binary Number\n');
            a = input(' Please enter a whole decimal number: ');
            bradleyJohnsonD2B(a)
        case 2
            fprintf(' Convert Binary Number to Decimal Number\n');
            b = input(' Please enter a binary string : ');
            johnsonBradleyB2D(b)
        case 3 
            fprintf( ' Thank you for using my program !!\n ');
        otherwise 
            fprintf( ' You Selected an Invalid Option, Please Choose Again ');
    end
end

Best Answer

Related Solutions

MATLAB: Matlab Coder – Create DLL

MATLAB: Repeating a sequence of code

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