Arithmetic and Logic Blocks

Arithmetic and Logic Blocks

The Addition Block The block performs addition and subtractions on its inputs. This block can add or subtract scalar, vector, or matrix inputs. We can specify the operation (+) or (-) and the number of inputs.

Example

The Subtract Block The Subtract block is an implementation of the Add block.

An Example

The Bias Block The bias block adds a bias (offset) to the input signal.

An Example

Output

The Weighted Sample Time Mathbox The weighted sample time math block adds, subtracts, multiplies, or divides the input signal u, by a weighted sample time Ts.

An Example The operation with weight of 2

Output

The Gain Block The gain block multiplies the input by a constant value (gain). The input and gain can each be: a scalar, vector, or matrix

The Product Block The Product block performs multiplication or division of its inputs

Example a = [1 2 3 4 5] and b = [-2 6-3 8 7]

The Divide Block We can the set the product to be the divide block.

The Product of Element Block The Product of Elements block is used to multiply many inputs.

Example a = [1 0-3 0 5 7 9]; b = [2-8 0 0 4 10 12]

The Dot Product Block The Dot Product block generates the dot product of its two input vectors.

Example A = [ 1 2 3 4 5]; B = [-2 6-3 8 7]

The Sign Block The Sign block indicates the sign of the input. The output is 1 when the input is greater than 0. When the output is 0, the output is 0. When the output is less than 0, the output is -1.

An Example X= 1/(-0.224)^7 + 2/(0.294)^8-3/(0.484)^2 x = 477.786

The Abs Block The Abs block outputs the absolute value of the inut.

An Example

The Unary Minus Block The Unary Minus block negates the input.

An Example

The Math Function Block The Math Function block performs the following 15 mathematical functions: exp, log, 10^u, log 10, magnitude^2, square, sqrt, pow (power), conj (complex conjugate), reciprocal, hypot (square root of the sum of squares), rem (remainder), mod (modulus), transpose, hermitian

An Example A = [1 1-j 2; 1+j 3 j;2 j 0];

The Rounding Function Block The Rounding Function block applies a rounding function to the input signal to produce the output signal. Floor rounds to the nearest integer towards minus infinity. Ceil rounds to the nearest integer toward positive infinity. Round rounds to the nearest integer. Fix rounds to the nearest integer toward zero.

Example

The Polynomial Block The Polynomial block uses a coefficient parameter to evaluate a real polynomial for the input value.

An Example p(x) = x 6 3 x 5 + 5x 3 4x 2 + 3x + 2

The MinMax Block The MinMax block outputs either the mininum or the maximum elements of the inputs.

An Example a = [1-1 -4 5 7-2 3-5 6 9-3 8 2 4 8 5]

The MinMax Running Resetting Block The MixMax Running Resettable block outputs the minimum or maximum of all past input u. We specify whether the block outputs the minimum of the maximum with the Function parameter. The block can reset its state based on an external reset signal R. When the reset signal R is True, the block resets the output to the value of initial condition parameter.

An Example U = [1-1 -4 5 7-2 3-5 6 9-3 8 2 4 8 5];

The Trigonometric Function Block The Trigonometric Function block performs the principle trigonometric funtions sine, cosine, and tangent, the inverse trigonometric functions asin, acos, atan, and atan2, the hyperbolic functions sinh, cosh, and tanh and the inverse hyperbolic functions asinh, acohs, and atanh.

An Example

The Sine Wave Function Block The Sine Wave Function block generates a sinusoid. The block can operate in either timebased or same-based mode.

An Example Sine wave function 1 is time based. Sine wave function 2 is sample based

Output

The Algebraic Constraint Block The Algebraic Constraint block contrains the input signal f(z) to zero and output an algebraic state z.

An Example F(z) = z2 + 4z + 3 + sinz z cosz

The Assignment Block The Assignment block assigns values to specified elements of the signal We specify the indices of the elements to be assigned values either by entering the indices or by connecting an external indices source.

An Example Index mode: zero based index option (1,2)

The Reshape Block The Reshape block changes the dimensionality of the input signal to another dimensionality.

An Example A = [1 0-3 -2 5 7 9 4 6];

The Matrix Concatenation Block The Matrix Concatenate block concatenates input matrices along rows or columns. E.g., y = [u1 u2 u3 un]

An Example A = [1-1 4; 5 7-2; 3-5 6]; B=[5 9-3; -2 8 2; 7-4 6]; C = [4 6; -3 8; 5-2];

The Vector Concatenate Block The Vector Concatenate block is a special case of the matrix concatenate block where the block operates in Vector Concatenate mode.

An Example a = [1 5 3] ; b = [5-2 7] ; c=[4-3 5]

The Relational Operator Block The relational operator block performs the specified comparison of its two inputs. The relation can be selected from the Relational Operator paramters. Operation descriptions: == True if the first input is equal to the second input ~= True if the first input is not equal to the second input < True if the first input is less than the second input <= True if the first input is less than or equal to the second input >= True if the first input is greater than or equal to the second input > True if the first input is greater than the second input

Example of the relational operator A = [ 2-3 5; 1 0-1; -2 1 0]; B= [2 1-2; -3 0 1;5-1 0];

The Logical Operator Block The logical operator block performs the specified logical operation on its inputs. Operation description: AND - True if all inputs are true OR - True if at least one input is true NAND - True if at least one input is false NOR - True when no inputs are true XOR - True if an odd number of inputs are true NOT - True if the input is false and vice versa

Example When A = 1, B = 0, C = 1 (variables are constant block)

The Interval Test Block The interval test block performs a test to determine if a signal is in a specified interval. The block outputs True if the input is between the values of the lower and upper limit parameters. The block outputs False if the input is outside those values

Example The upper limit is set to 127 and the lower limit is set to -128

The Interval Test Dynamic Block Like the interval test block, it performs a test to determine if a signal is in a specified interval. The input is compared with signal up or lo.

Example

The Combinatorial Logic Block The combinatorial logic block, often referred as a combinational block, implements a standard truth table for modeling programmable logic arrays (PLAs), logic circuits, and decision table.

Example: truth table of full adder Combinatorial logic: [0 0; 1 0; 1 0; 0 1; 1 0; 0 1 ; 0 1; 1 1].

Output

The Compared to Zero Block The compared to zero block compares an input signal to zero.

Example

The Compare to Constant Block The compare to constant block compares an input signal to a constant. The constant must be specified in the Constant Value Parameter and how the input is compared similar to the Compare to Zero Block.

An Example A = [1 2 3 4 5]; B = [-2 6-3 -8-4] ;

The Bit Set Block The Bit Set Block sets the specified bit of the stored integer to one. We specify the bit to set to one with the index of bit parameter. Bit zero is the least significant bit.

An Example Bit Set Block parameter : [0 2 1 3]

The Bit Clear Block The Bit Clear Block sets the specified bit, given by its index, of the stored integer to zero. We specify the bit to set to zero with the index of bit parameter. Bit zero is the least significant bit.

An Example Bit Clear Block index is 3

The Bitwise Operator Block The Bitwise operator block performs the specified bitwise operation on its operand. Bitwise operation treats the operands as a vector of bits rather than a single number. Operation descriptions: AND True if the corresponding bits are all TRUE OR - True if at least one of the corresponding bits is TRUE NAND True if at least one of the corresponding bits is FALSE NOR - True if no corresponding bits are TRUE XOR True if an odd number of corresponding are TRUE NOT True if the input is FALSE, and vice versa

An Example

The Shift Arithmetic Block The shift arithmetic block is be used to shift the bits or the binary point of a binary word or both. The block performs arithmetic bit shifts on signed numbers

An Example

The Extract Bits Block The Extract Bits block allows us to output a contiguous selection of bits from the stored integer value of the input signal. The Bits to extract parameter defines the method by which we select the output bits

An Example

The Detect Increase Block The Detect Increase Block determines if an input is strictly greater than its previous value. The output is true (not 0), when the input signal is greater than its previous value. The output is false, when the input signal is less than or equal to its previous value.

Example

Output

The Detect Decrease Block The detect decrease block determines if an input is strictly less than its previous value. The output is true, when the input is less than its previous value. The output is false, when the input signal is greater than or equal its previous value.

An example

Output

The Detect Change Block The detect change block determines if an input does not equal its previous value when the output is true. The output is false, when the input signal equals its previous value.

Example

Output

The Detect Rise Positive Block The Detect Rise Positive Block determines if the input is strictly positive, and its previous value was nonpositive. The output is true, when the input signal is greater than zero, and its previous value was less than zero. The output is false, when the input is negative or zero, or if the input is positive and its previous value was also positive.

An Example

Output

The Detect Rise Nonnegative Block The Detect Rise Nonnegative block determines if the input is greater than or equal to zero, and its previous value was less than zero. The output is true, when the input signal is greater than or equal to zero, and its previous value was less than zero. The output is false, when the input signal is less than zero, or if nonnegative, its previous value was greater than or equal to zero.

An Example

Output

The Detect Fall Negative Block The Detect Fall Negative block determines if the input is less than zero and its previous value was greater than or equal to zero. The output is true, when the input signal is less than zero, and its previous value was greater than or equal to zero. The output is false, when the input signal is greater than or equal to zero, or if the input is nonnegative and previous value was positive or zero.

An Example

Output

The Detect Fall Nonpositive Block The Detect Fall Nonpositive block determines if the input is less than or equal to zero, and its previous value was positive. The output is true, when the input signal is less than or equal to zero, and its previous value was greater than zero. The output is false, when the input signal is greater than zero, or if it is nonpositive and its previous value was non positive.

An Example

Output

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