COMPARISONOPS Array Comparison Operators

Section: Mathematical Operators

Usage

There are a total of six comparison operators available in FreeMat, all of which are binary operators with the following syntax
```  y = a < b
y = a <= b
y = a > b
y = a >= b
y = a ~= b
y = a == b
```

where `a` and `b` are numerical arrays or scalars, and `y` is a `logical` array of the appropriate size. Each of the operators has three modes of operation, summarized in the following list:

1. `a` is a scalar, `b` is an n-dimensional array - the output is then the same size as `b`, and contains the result of comparing each element in `b` to the scalar `a`.
2. `a` is an n-dimensional array, `b` is a scalar - the output is the same size as `a`, and contains the result of comparing each element in `a` to the scalar `b`.
3. `a` and `b` are both n-dimensional arrays of the same size - the output is then the same size as both `a` and `b`, and contains the result of an element-wise comparison between `a` and `b`.
The operators behave the same way as in `C`, with unequal types being promoted using the standard type promotion rules prior to comparisons. The only difference is that in FreeMat, the not-equals operator is `~=` instead of `!=`.

Examples

Some simple examples of comparison operations. First a comparison with a scalar:
```--> a = randn(1,5)

a =
-0.1760    0.0212    0.0095    2.0556   -1.1627

--> a>0

ans =
0 1 1 1 0
```

Next, we construct two vectors, and test for equality:

```--> a = [1,2,5,7,3]

a =
1 2 5 7 3

--> b = [2,2,5,9,4]

b =
2 2 5 9 4

--> c = a == b

c =
0 1 1 0 0
```