C++ (Cpp) rx_ary_size Beispiele

Beispiel #1

Datei: libsvm.c Projekt: atittan/rb-libsvm

/*
   call-seq:
     problem.set_examples(labels, examples_array)

   Sets the examples and their label for a training set.

   The indices of the arrays are supposed to correspond. If they don't
   match in length an ArgumentError is raised.

   @return [Integer] number of examples in the traning set
*/
static VALUE cProblem_examples_set(VALUE obj,VALUE labels_ary,VALUE examples_ary)
{
  struct svm_problem *prob;
  int i;

  int num = rx_ary_size(labels_ary);

  if(num != rx_ary_size(examples_ary)) {
    rb_raise(rb_eArgError, "Number of labels (%i) does not match number of features (%i).", num, rx_ary_size(examples_ary));
  }

  Data_Get_Struct(obj, struct svm_problem, prob);

  if(prob->l > 0) {
    free(prob->y);
    for(i = 0; i < num; ++i) {
      free(*(prob->x+i));
    }
    free(prob->x);
  }

  prob->y = calloc(num,sizeof(double));
  if(prob->y == 0) {
    rb_raise(rb_eNoMemError, "%s:%i", __FILE__,__LINE__);
  }

  for(i = 0; i < num; ++i) {
    *(prob->y+i) =  NUM2DBL(rb_ary_entry(labels_ary,i));
  }

  prob->x = examples_ary_to_internal(examples_ary);
  prob->l = num;

  return INT2FIX(num);
}

Beispiel #2

Datei: libsvm.c Projekt: laboon/rb-libsvm

static struct svm_node *example_to_internal(VALUE example_ary)
{
  struct svm_node *x, *node_struct;
  int example_ary_len, j;
  VALUE node;

  /* allocate memory for it */
  example_ary_len = rx_ary_size(example_ary);
  x = (struct svm_node *)calloc(example_ary_len+1,sizeof(struct svm_node));
  if(x == 0) {
    rb_raise(rb_eNoMemError, "on Libsvm::Node allocation" " %s:%i", __FILE__,__LINE__);
  }
  /* loop it's element nodes */
  for(j = 0; j < example_ary_len; ++j) {
    node = rb_ary_entry(example_ary,j);
    Data_Get_Struct(node,struct svm_node,node_struct);
    memcpy(x+j,node_struct,sizeof(struct svm_node));
  }
  /* add terminator */
  memcpy(x+example_ary_len,&TERMINATOR,sizeof(struct svm_node));

  return x;
}