Documentation

lt

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

Syntax

c = lt(a,b)
a < b

Description

c = lt(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

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

a = fi(pi);
b = fi(pi, 1, 32);
a < b
ans =

  logical

   0

Input a has a 16-bit word length, while input b has a 32-bit word length. The lt function returns 0 because after quantization, the value of a is greater than that of b.

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 lt 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.

See Also

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