rad2deg — Convert angle values from radians to degrees with MATLAB-compatible array behavior.
d = rad2deg(r) converts each angle in r from radians to degrees using r * 180 / pi. It applies element-wise across scalar, vector, matrix, and N-D inputs using MATLAB-compatible typing and shape rules.
Syntax
Y = rad2deg(X)Inputs
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
X | Any | Yes | — | Input scalar, array, logical array, complex value, or gpuArray. |
Returns
| Name | Type | Description |
|---|---|---|
Y | Any | Element-wise radian-to-degree conversion result. |
Errors
| Identifier | When | Message |
|---|---|---|
RunMat:rad2deg:InvalidInput | Input cannot be interpreted as supported numeric/logical/complex data. | rad2deg: invalid input |
RunMat:rad2deg:Internal | Internal gather/conversion/allocation flow failed. | rad2deg: internal error |
How rad2deg works
- Operates element-wise on scalars, vectors, matrices, and N-D tensors.
- Integer and logical inputs are promoted to double precision before conversion.
- Complex inputs are scaled component-wise, matching ordinary multiplication by
180/pi. - Output shape matches the input shape.
- String inputs are unsupported and raise a builtin-scoped error.
Examples
Converting a scalar angle
d = rad2deg(pi)Expected output:
d = 180Converting a vector of angles
angles = [0 pi/6 pi/4 pi/3 pi/2];
d = rad2deg(angles)Expected output:
d = [0 30 45 60 90]Using rad2deg with coding agents
Open a RunMat example with live inputs, then ask the agent to explain how rad2deg changes the result.
Run a small rad2deg example, explain the result, then change one input and compare the output.
FAQ
Is rad2deg(x) equivalent to x*180/pi?⌄
Yes. The builtin exists for readability and MATLAB compatibility.
Does rad2deg preserve array shape?⌄
Yes. Each element is converted independently and the original shape is preserved.
Related Math functions
Trigonometry
acos · acosh · asin · asinh · atan · atan2 · atanh · cos · cosd · cosh · deg2rad · sin · sind · sinh · tan · tand · tanh
Elementwise
abs · angle · complex · conj · double · exp · expm1 · factorial · gamma · hypot · imag · ldivide · log · log10 · log1p · log2 · minus · nextpow2 · plus · pow2 · power · rdivide · real · sign · single · sqrt · times
Reduction
all · any · cummax · cummin · cumprod · cumsum · cumtrapz · diff · gradient · max · mean · median · min · nnz · prod · std · sum · trapz · var
Structure
Open-source implementation
Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how rad2deg is executed, line by line, in Rust.
- View the source for rad2deg 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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