6.5.3 vsip_dqrd_getattr_p - Get QR Decomposition Attributes

typedef struct _vsip_qr_attr_f { 
  vsip_length n; 
  vsip_length m; 
  vsip_qrd_qopt Qopt; 
} vsip_qr_attr_f; 
 
typedef vsip_qr_attr_f vsip_cqr_attr_f; 
 
void vsip_qrd_getattr_f(const vsip_qr_f *qrd, vsip_qr_attr_f *attr); 
void vsip_cqrd_getattr_f(const vsip_cqr_f *qrd, vsip_cqr_attr_f *attr);

Description

This function retrieves the attributes of a QR decomposition object and stores them in a vsip_dqr_attr_p structure. The attributes provide complete information about the QR decomposition, including the dimensions of the original matrix and the options used during creation.

Parameters

• const vsip_dqr_p* qrd: Pointer to the QR decomposition object.

• vsip_dqr_attr_p* attr: Pointer to the attribute structure where the QR decomposition attributes will be stored.

Example

vsip_qr_f *qrd; 
vsip_qr_attr_f attr; 
vsip_length m = 100, n = 50; 
 
// Create a QR decomposition object 
qrd = vsip_qrd_create_f(m, n, VSIP_QRD_SAVEQ); 
if (qrd == NULL) { 
    // Handle error 
} 
 
// Get the attributes of the QR decomposition object 
vsip_qrd_getattr_f(qrd, &attr); 
 
printf("QR decomposition attributes:\n"); 
printf("  Matrix dimensions: %lu x %lu\n", attr.m, attr.n); 
printf("  QR option: %d\n", attr.qopt); 
 
vsip_qrd_destroy_f(qrd);