issortedrows — Determine whether matrix or table rows are sorted.
issortedrows(A) returns true when A is already in the row order produced by sortrows(A).
Syntax
tf = issortedrows(A)
tf = issortedrows(A, column, direction, options)Inputs
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
A | Any | Yes | — | Input column vector, matrix, or table. |
args | Any | Variadic | — | Column selectors, direction modes, ComparisonMethod, and MissingPlacement. |
Returns
| Name | Type | Description |
|---|---|---|
tf | LogicalArray | True when rows are sorted according to the requested row order. |
Errors
| Identifier | When | Message |
|---|---|---|
RunMat:issortedrows:InvalidInput | Input or row-sorting arguments are invalid. | issortedrows: invalid input |
RunMat:issortedrows:InvalidArgument | A column, direction, comparison, missing-placement, or output argument is invalid. | issortedrows: invalid argument |
How issortedrows works
- Supports the same row ordering arguments as
sortrows, including column and direction arguments for supported inputs.
Example
Check sorted rows
tf = issortedrows([1 2; 2 3])Expected output:
tf = trueUsing issortedrows with coding agents
Open a RunMat example with live inputs, then ask the agent to explain how issortedrows changes the result.
Run a small issortedrows example, explain the result, then change one input and compare the output.
Related Array functions
Sorting Sets
argsort · intersect · ismember · ismembertol · issorted · setdiff · setxor · sort · sortrows · union · unique
Grouping
accumarray · combinations · discretize · findgroups · groupcounts · grp2idx · splitapply
Shape
blkdiag · cat · circshift · diag · flip · fliplr · flipud · horzcat · ipermute · kron · permute · repelem · repmat · reshape · rot90 · squeeze · toeplitz · tril · triu · vertcat
Open-source implementation
Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how issortedrows is executed, line by line, in Rust.
- View the source for issortedrows in Rust on GitHub
- Learn how the RunMat runtime works
- Found a bug? Open an issue with a minimal reproduction.
About RunMat
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