Error going in a function

[Elvio Esposito]

Hi I have no error compiling, but running my project it stops before entering a function and debugging I have an error about Segmentation fault. The function:

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Mat logGabor(matriz filter,Mat filter,double r_o,double theta_o,double sigma_theta, matriz radius,matriz theta,int cols,int rows,double sigma_r,int *padSize){
 
Mat rpad;
int k=*padSize;
 
printf("Welcome to the function"); //Here the error
...

More info: I created the matriz as : typedef double** matriz;
and a createmat function that give back a double** and in this function I allocate space for matriz and works. In the main:

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Mat chr-Rpad[4][5]; //chrOrient=4;chrScales=5
for(int i_or=1;i_or<chrOrient;i_or++){
  for(int i_sc=1;i_sc<chrScales;i_sc++){
      //some math calculation
     chrRpad[i_or-1][i_sc-1]=abs(logGabor(filter,imftt2,r_o,theta_o,sigma_theta,radius,theta,cols,rows,sigma_r,padSize));

[Shurik]

If you have, for example

int padSize;

call function as:

logGabor(filter,imftt2,r_o,theta_o,
               sigma_theta,radius,theta,
               cols,rows,sigma_r, &padSize)

[Elvio Esposito]

I have :

int*padSize;

padSize=(int*)malloc(sizeof(int));

invoking with & operator is an error.I assign a value to the padSize in another function.And I use malloc to conserve it.

[GReaper]

Can you post your code? Or if it's too big, can you post a simplified version that exhibits the same behaviour?

[Elvio Esposito]

I post something more. All the project now is around 500 lines and they compile. Don t gonna post the function when I can t enter and how I call it in main. It s above how it starts. That s a function give me before a lot of problem because (see insider comments):

void pre_filter_Computations(matriz radius,matriz theta,int cols,int rows){

  double X[rows][cols],Y[rows][cols];
  double x[cols],y[rows];
  double epsilon = 0.0001;

  for(int i=0;i<cols;i++){
      x[i]=((double)(i-cols)/2)/((double)cols/2);
  }


  for(int z=0;z<rows;z++){
       y[z]=-(((double)(z-rows)/2)/((double)rows/2));
   }

//MESHGRID
for(int m=0;m<rows;m++){     //I putted cols before for the meshgrid
  for(int n=0;n<cols;n++){   // I used rows before the meshgrid
       X[m][n]=x[m];
       Y[m][n]=y[n];
  }
}

      for(int a=0;a<rows;a++){
            for(int b=0;b<cols;b++){

                 X[a][b] = pow(X[a][b],2);
                 Y[a][b] = pow(Y[a][b],2);
                 X[a][b] = X[a][b] + Y[a][b];
                  radius[a][b] = sqrt(X[a][b]);

          }
      }

    radius[rows/2+1][cols/2+1]=1;

      for(int a=0;a<rows;a++){
           for(int b=0;b<cols;b++){
               radius [a][b]= radius[a][b] + epsilon;
               theta[a][b] = atan2(Y[a][b],X[a][b])*180/PI;
           }
      }
}

Whit meshgrid I mean:

[X,Y] = meshgrid(x,y) transforms the domain specified by vectors x and y into arrays X and Y, which can be used to evaluate functions of two variables and three-dimensional mesh/surface plots. The rows of the output array X are copies of the vector x; columns of the output array Y are copies of the vector y.

As for my teacher's info I have to pass to x vector the cols and to y the rows (as I do at the start of that function) I putted before cols in the meshgrid innested for. And so printing the rows and cols after the meshgrid, they were too much. But now maybe I have an error at meshgrid calculation. I m not sure it work as I said in the explication. That' s important because it create after the radius I pass to the function I can not enter. MAybe the error is there.

[Salem]

Closed for cross-post madness and crappy unreadable code.