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Function
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Description
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gt(x,xs,b)
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Fuzzy greater than. Proportional band rising linearly from 0 to 1 as x rises from xs-b/2 to xs+b/2. Like a fuzzy version of x > xs with the transition between 0 and 1 occurring over a proportional band specified by b
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lt(x,xs,b)
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Fuzzy less than. Proportional band falling linearly from 1 to 0 as x rises from xs-b/2 to x+b/2. Like a fuzzy version of x < xs with the transition between 1 and 0 occurring over a proportional band specified by b
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ramp(x,x1,y1,x2,y2)
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General ramp function. x=sensed variable, x1=sensed value at lower end of x-axis, y1=returned value at lower end of x-axis, x2=sensed value at upper end of x-axis, y2=returned value at upper end of x-axis
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int(x)
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Integer value of x, rounded towards zero
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ceil(x)
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Ceiling - nearest integer above x
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floor(x)
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Floor - nearest integer below x
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if(condition, val1, val2)
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Fuzzy logical if. If the condition is 1 or more, returns val1; if 0 or less returns val2; else returns a weighted sum of val1 and val2, where val1’s weighting = condition.
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min(v1,v2,v3,...)
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Minimum of a set of values, v1, v2, v3, ...
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max(v1,v2,v3,...)
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Maximum of a set of values, v1, v2, v3, ...
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log10(x)
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Base-10 logarithm of x
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log(x)
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Natural logarithm of x
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exp(x)
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ex, where e is the base of natural logarithms
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pow(y, x)
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Returns x raised to the power of y
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sqrt(x)
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Square root of x
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abs(x)
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Absolute value of x
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sign(x)
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Returns 1 if x is positive or zero, -1 otherwise
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sin(x)
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Sine of x (NB x must be in degrees)
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asin(x)
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Arcsine of x (NB returns value in degrees)
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cos(x)
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Cosine of x (NB x must be in degrees)
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acos(x)
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Arccosine of x (NB returns value in degrees)
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tan(x)
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Tangent of x (NB x must be in degrees)
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atan(x)
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Arctangent of x (NB returns value in degrees. Use atan2() rather than this if you need the angle to be in the correct quadrant)
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atan2(y, x)
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Arctangent of y/x (NB returns value in degrees. Use this rather than atan() if you need the angle to be in the correct quadrant)
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sinh(x)
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Hyperbolic sine of x
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cosh(x)
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Hyperbolic cosine of x
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tanh(x)
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Hyperbolic tangent of x
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rand()
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Random value between 0 and 1
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rand(min, max)
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Random value between min and max
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avg(v1,v2,v3,...)
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Average of a set of values, v1, v2, v3, ...
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sum(v1,v2,v3,...)
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Sum of a set of values, v1, v2, v3, ...
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ta(n)
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variable ta for room number n
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tdr(n)
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variable tdr for room number n
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tr(n)
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variable tr for room number n
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rh(n)
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variable rh for room number n
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g(n)
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variable g for room number n
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co2(n)
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variable co2 for room number n
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sol(n)
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variable sol for room number n
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e1(n)
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variable e1 for room number n
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Constant
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Description
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pi
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3.14159265359
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e
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2.71828182846
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