# gt, >

Determine greater than

## Description

example

A > B returns a logical array with elements set to logical 1 (true) where A is greater than B; otherwise, it returns logical 0 (false).

The test compares only the real part of numeric arrays. gt returns logical 0 (false) where A or B have NaN or undefined categorical elements.

gt(A,B) is an alternate way to execute A > B, but is rarely used. It enables operator overloading for classes.

## Examples

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### Test Vector Elements

Determine if vector elements are greater than a given value.

Create a numeric vector.

A = [1 12 18 7 9 11 2 15];

Test the vector for elements that are greater than 10.

A > 10
ans =

0     1     1     0     0     1     0     1

The result is a vector with values of logical 1 (true) where the elements of A satisfy the expression.

Use the vector of logical values as an index to view the values in A that are greater than 10.

A(A > 10)
ans =

12    18    11    15

The result is a subset of the elements in A.

### Replace Elements of Matrix

Create a matrix.

A = magic(4)
A =

16     2     3    13
5    11    10     8
9     7     6    12
4    14    15     1

Replace all values greater than 9 with the value 10.

A(A > 9) = 10
A =

10     2     3    10
5    10    10     8
9     7     6    10
4    10    10     1

The result is a new matrix whose largest element is 10.

### Compare Values in Categorical Array

Create an ordinal categorical array.

A = categorical({'large' 'medium' 'small'; 'medium' ...
'small' 'large'},{'small' 'medium' 'large'},'Ordinal',1)
A =

large       medium      small
medium      small       large

The array has three categories: 'small', 'medium', and 'large'.

Find all values greater than the category 'medium'.

A > 'medium'
ans =

1     0     0
0     0     1

A value of logical 1 (true) indicates a value greater than the category 'medium'.

Compare the rows of A.

A(1,:) > A(2,:)
ans =

1     1     0

The function returns logical 1 (true) where the first row has a category value greater than the second row.

### Test Complex Numbers

Create a vector of complex numbers.

A = [1+i 2-2i 1+3i 1-2i 5-i];

Find the values that are greater than 2.

A(A > 2)
ans =

5.0000 - 1.0000i

gt compares only the real part of the elements in A.

Use abs to find which elements are outside a radius of 2 from the origin.

A(abs(A) > 2)
ans =

2.0000 - 2.0000i   1.0000 + 3.0000i   1.0000 - 2.0000i   5.0000 - 1.0000i

The result has more elements since abs accounts for the imaginary part of the numbers.

### Compare Dates

Create a vector of dates.

A = datetime([2014,05,01;2014,05,31])
A =

01-May-2014
31-May-2014

Find the dates that occur after May 10, 2014.

A(A > '2014-05-10')
ans =

31-May-2014

## Input Arguments

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### A — Left arraynumeric array | logical array | character array | ordinal categorical array | datetime array | duration array

Left array, specified as a numeric array, logical array, character array, categorical array, datetime array, or duration array. Inputs A and B must be the same size unless one is a scalar. A scalar input expands into an array of the same size as the other input.

If one input is an ordinal categorical array, the other input can be an ordinal categorical array, a cell array of strings, or a single string. A single string expands into a cell array of strings of the same size as the other input. If both inputs are ordinal categorical arrays, they must have the same sets of categories, including their order. See Compare Categorical Array Elements for more details.

If one input is a datetime array, the other input can be a datetime array, a date string, or a cell array of date strings.

If one input is a duration array, the other input can be a duration array or a numeric array. eq treats each numeric value as a number of standard (86400 s) days.

### B — Right arraynumeric array | logical array | character array | ordinal categorical array | datetime array | duration array

Right array, specified as a numeric array, logical array, character array, categorical array, datetime array, or duration array. Inputs A and B must be the same size unless one is a scalar. A scalar input expands into an array of the same size as the other input.

If one input is an ordinal categorical array, the other input can be an ordinal categorical array, a cell array of strings, or a single string. A single string expands into a cell array of strings of the same size as the other input. If both inputs are ordinal categorical arrays, they must have the same sets of categories, including their order. See Compare Categorical Array Elements for more details.

If one input is a datetime array, the other input can be a datetime array, a date string, or a cell array of date strings.

If one input is a duration array, the other input can be a duration array or a numeric array. eq treats each numeric value as a number of standard (86400 s) days.