====== Expression Numbers ======

==== Random ====

rand(lo_value,hi_value,signal) - random number in the range (lo_value,hi_value)

<code>
Example : rand() will generate a random number in the range 0 to 1

Set_Pipeline_Parameter_From_Expression
/PARAMETER_NAME=TEST1
/EXPRESSION=RAND()
/AS_INTEGER=FALSE
;

 TEST1 = 0.220525

Example : rand(lo_value,hi_value) will generate a random number in the range lo_value to hi_value

Set_Pipeline_Parameter_From_Expression
/PARAMETER_NAME=TEST2
/EXPRESSION=RAND(2,3)
/AS_INTEGER=FALSE
;

 TEST2 = 2.232995

Example : rand(lo_value,hi_value,signal) will generate a random number in the range lo_value to hi_value with the same number of components and frames as signal.

Set_Pipeline_Parameter_From_Expression
/PARAMETER_NAME=TEST3
/EXPRESSION=RAND(2,3,FRAME_NUMBERS::ORIGINAL::FRAMES)
/AS_INTEGER=FALSE
;

::TEST3 = 2.808424+2.582592+2.346721+2.697052+2.662510+2.861250+2.843808+...(to number of frames)

Example : rand(lo_value,hi_value,signal). If signal is a number, that number of values are returned.

Set_Pipeline_Parameter_From_Expression
/PARAMETER_NAME=TEST4
/EXPRESSION=RAND(2,3,3)
/AS_INTEGER=FALSE
;

::TEST4 = 2.446495 + 2.718410 + 2.201863

Example : Create a TARGET with random values between 0 and 1

Create_Target
/SIGNAL_NAMES=TEST5
! /SIGNAL_DESCRIPTION=
/EXPRESSION=RAND(0,1,TARGET::ORIGINAL::LFT1)
! /INCLUDE_CALFILE=FALSE
;

View the resulting signal in the 3D viewer by turning on the target trail
</code>

{{:random_target.jpg}}

<code>Example: create a TARGET with random values between 0 and 1.

Create_Target
/SIGNAL_NAMES=TEST6
! /SIGNAL_DESCRIPTION=
/EXPRESSION=VECTOR(RAND(0,1,FRAME_NUMBERS::ORIGINAL::FRAMES),RAND(0,1,FRAME_NUMBERS::ORIGINAL::FRAMES),RAND(0,1,FRAME_NUMBERS::ORIGINAL::FRAMES))
! /INCLUDE_CALFILE=FALSE
;

Note that all components contain different values\\
</code>

{{:Random7.jpg}}

{{:random7view.jpg}}

<code>
Example : Create a TARGET where each frame is on a random location on the surface of a sphere of radius 1

Evaluate_Expression
/EXPRESSION=RAND(-PI(),PI(),FRAME_NUMBERS::ORIGINAL::FRAMES)
/RESULT_TYPES=DERIVED
/RESULT_FOLDERS=RADIUS
/RESULT_NAME=VERTICAL
! /APPLY_AS_SUFFIX_TO_SIGNAL_NAME=FALSE
;

Evaluate_Expression
/EXPRESSION=RAND(0,2*PI(),FRAME_NUMBERS::ORIGINAL::FRAMES)
/RESULT_TYPES=DERIVED
/RESULT_FOLDERS=RADIUS
/RESULT_NAME=HORIZONTAL
! /APPLY_AS_SUFFIX_TO_SIGNAL_NAME=FALSE
;

Create_Target
/SIGNAL_NAMES=SPHERE
! /SIGNAL_DESCRIPTION=
/EXPRESSION=VECTOR(
COS(DERIVED::RADIUS::VERTICAL)*COS(DERIVED::RADIUS::HORIZONTAL),
-COS(DERIVED::RADIUS::VERTICAL)*SIN(DERIVED::RADIUS::HORIZONTAL),
SIN(DERIVED::RADIUS::VERTICAL))
! /INCLUDE_CALFILE=FALSE
;
</code>

{{:random8view.jpg}}