gt

Determine whether real-world value of one fi object is greater than another

Syntax

c = gt(a,b)
a > b


Description

c = gt(a,b) is called for the syntax a > b when a or b is a fi object. a and b must have the same dimensions unless one is a scalar. A scalar can be compared with another object of any size.

a > b does an element-by-element comparison between a and b and returns a matrix of the same size with elements set to 1 where the relation is true, and 0 where the relation is false.

In relational operations comparing a floating-point value to a fixed-point value, the floating-point value is cast to the same word length and signedness as the fi object, with best-precision scaling.

Examples

Compare Two fi Objects

Use the gt function to determine whether the real-world value of one fi object is greater than another.

a = fi(pi);
b = fi(pi, 1, 32);
a > b

ans = logical
   1

Input a has a 16-bit word length, while input b has a 32-bit word length. The gt function returns 1 because after quantization, the value of a is greater than that of b.

Compare a Double to a fi Object

When comparing a double to a fi object, the double is cast to the same word length and signedness of the fi object.

a = fi(pi);
b = pi;
a > b

ans = logical
   0

The gt function casts b to the same word length as a, and returns 0 because the two inputs have the same real-world value. This behavior allows relational operations to work between fi objects and floating-point constants without introducing floating-point values in generated code.

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

Usage notes and limitations:

• Fixed-point signals with different biases are not supported.

HDL Code Generation
Generate Verilog and VHDL code for FPGA and ASIC designs using HDL Coder™.