rmmissing — Remove missing elements, rows, or columns.
rmmissing(A) removes entries containing missing values. For matrices and tables it removes rows by default; passing dimension 2 removes columns.
Syntax
B = rmmissing(A, ...)Inputs
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
A | Any | Yes | — | Input value. |
args | Any | Variadic | — | Method, dimension, or option arguments. |
Returns
| Name | Type | Description |
|---|---|---|
B | Any | Result value. |
TF | LogicalArray | Logical mask of entries, rows, or columns that were filled or removed. |
Returned values from rmmissing depend on how many outputs the caller requests.
Errors
| Identifier | When | Message |
|---|---|---|
RunMat:missing:InvalidArgument | Arguments do not match a supported missing-value syntax. | missing-value builtin: invalid argument |
RunMat:missing:UnsupportedType | The input type has no missing-value representation in RunMat. | missing-value builtin: unsupported input type |
RunMat:missing:InternalError | Internal shape or table materialization fails. | missing-value builtin: internal error |
How rmmissing works
- Vectors remove individual missing elements while preserving row or column orientation.
- Matrices remove rows by default and columns when
dimis2or the option is"columns". - Tables remove rows with any missing variable entry by default, preserving variable names and row names.
- Two-output calls return the result and a logical mask indicating removed rows, columns, or vector elements.
- Every integer class has no standard missing value, so integer input is an exact class-preserving no-op with an all-false mask. A typed-integer dimension is a separately declared RunMat extension and MATLAB compatibility mode rejects it before provider access.
Example
Remove missing columns
B = rmmissing([1 NaN 3; 4 5 6], 2)Expected output:
B = [1 3; 4 6]Using rmmissing with coding agents
Open a RunMat example with live inputs, then ask the agent to explain how rmmissing changes the result.
Run a small rmmissing example, explain the result, then change one input and compare the output.
Related Missing functions
anymissing · fillmissing · ismissing · missing · movmad · nanmean · nanmedian · nanmin · nanstd · nansum · nanvar · standardizeMissing
Open-source implementation
Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how rmmissing is executed, line by line, in Rust.
- View the source for rmmissing 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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