Campbell CR800 Spécifications télécharger pdf (Page 233)

Section 8. Processing and Math Instructions

Sgn (Number)

Used to find the sign value of a number.

Syntax

x = Sgn (number)

Remarks

Returns an integer indicating the sign of a number.

The argument number can be any valid numeric expression. Its sign

determines the value returned by the Sgn function:

If X > 0, then Sgn(X) = 1.

If X = 0, then Sgn(X) = 0.

If X < 0, then Sgn(X) = -1.

Sgn Function Example

The example uses Sgn to determine the sign of a number.

Dim Msg, Number 'Declare variables.

Number = Volt(1) 'Get user input.

Select Case Sgn(Number) 'Evaluate Number.

Case 0 'Zero.

Msg = 0

Case 1 'Positive.

Msg = 1

Case -1 'Negative.

Msg = -1

End Select

Sin (Angle)

Returns the sine of an angle.

Syntax

x = Sin (angle)

Remarks

Source can be any valid numeric expression measured in radians.

The Sin function takes an angle and returns the ratio of two sides of a right

triangle. The ratio is the length of the side opposite the angle divided by the

length of the hypotenuse.

The result lies in the range -1 to 1.

To convert degrees to radians, multiply degrees by π/180. To convert radians

to degrees, multiply radians by 180/π.

Returns the sine of the value in parentheses. The input must be in radians.

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Campbell CR800 Spécifications Page 233