Operations on Objects

The following commands replace all the elements of a _REAL object by the specified function of the elements.

qcl>SQUARE HDF_OBJECT
qcl>SQRT   HDF_OBJECT
qcl>ABS    HDF_OBJECT
qcl>LOG    HDF_OBJECT
qcl>EXP    HDF_OBJECT
qcl>SIN    HDF_OBJECT
qcl>ASIN   HDF_OBJECT
qcl>COS    HDF_OBJECT
qcl>ACOS   HDF_OBJECT
qcl>TAN    HDF_OBJECT
qcl>ATAN   HDF_OBJECT

They also work on data type _INTEGER but of course rounding will occur where required. A slice of an object can be specified in these commands.

There are a few commands that operate on the elements of an object using a specified constant.

qcl>MASK HDF_OBJECT,HDF_CONSTANT

Sets the elements equal to the constant.

qcl>SCALE HDF_OBJECT,HDF_CONSTANT

Multiplies the elements by the constant.

qcl>OFFSET HDF_OBJECT,HDF_CONSTANT

Adds the specified constant to the elements of the object.

qcl>RANDOM HDF_OBJECT,HDF_CONSTANT

Sets the elements to a sequence of random numbers in the range 0-1 using the constant (integer) as a seed.

qcl>MOD HDF_OBJECT,HDF_CONSTANT

Sets each element equal to the value modulo the constant.

Two commands are available which require two constant values to be specified.

qcl>CLIP HDF_OBJECT,HDF_C1,HDF_C2

This clips the element values to lie in the range HDF_C1 - HDF_C2.

qcl>RAMP HDF_OBJECT,HDF_C1,HDF_C2

This sets the jth element to the ramp function specified by C1+(J-1)*C2.