diff --git a/lib/node_modules/@stdlib/math/base/special/heavisidef/README.md b/lib/node_modules/@stdlib/math/base/special/heavisidef/README.md
index df19a274c4f4..7e44bf80c52b 100644
--- a/lib/node_modules/@stdlib/math/base/special/heavisidef/README.md
+++ b/lib/node_modules/@stdlib/math/base/special/heavisidef/README.md
@@ -155,7 +155,7 @@ var heavisidef = require( '@stdlib/math/base/special/heavisidef' );
var opts = {
'dtype': 'float32'
};
-var x = uniform( 101, -10.0, 10.0, opts );
+var x = uniform( 100, -10.0, 10.0, opts );
logEachMap( 'H(%0.4f) = %0.4f', x, heavisidef );
```
@@ -164,6 +164,104 @@ logEachMap( 'H(%0.4f) = %0.4f', x, heavisidef );
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
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+
+
+
+### Usage
+
+```c
+#include "stdlib/math/base/special/heavisidef.h"
+```
+
+#### stdlib_base_heavisidef( x, continuity )
+
+Evaluates the [Heaviside function][heaviside-function] for a single-precision floating-point number.
+
+```c
+float y = stdlib_base_heavisidef( 0.0f, STDLIB_BASE_HEAVISIDEF_CONTINUITY_HALF_MAXIMUM );
+// returns 0.5f
+
+y = stdlib_base_heavisidef( 0.0f, STDLIB_BASE_HEAVISIDEF_CONTINUITY_LEFT_CONTINUOUS );
+// returns 0.0f
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] float` input value.
+- **continuity**: `[in] STDLIB_BASE_HEAVISIDEF_CONTINUITY` continuity option.
+
+The `continuity` parameter may be one of the following values:
+
+- `STDLIB_BASE_HEAVISIDEF_CONTINUITY_HALF_MAXIMUM`: if `x == 0`, the function returns `0.5`.
+- `STDLIB_BASE_HEAVISIDEF_CONTINUITY_LEFT_CONTINUOUS`: if `x == 0`, the function returns `0.0`.
+- `STDLIB_BASE_HEAVISIDEF_CONTINUITY_RIGHT_CONTINUOUS`: if `x == 0`, the function returns `1.0`.
+- `STDLIB_BASE_HEAVISIDEF_CONTINUITY_DISCONTINUOUS`: if `x == 0`, the function returns `NaN`.
+
+If provided a `continuity` argument which is not one of the enumeration constants listed above, the function returns `NaN` for `x == 0`, behaving like the discontinuous case.
+
+```c
+float stdlib_base_heavisidef( const float x, const STDLIB_BASE_HEAVISIDEF_CONTINUITY continuity );
+```
+
+
+
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+
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+
+
+### Examples
+
+```c
+#include "stdlib/math/base/special/heavisidef.h"
+#include
+
+int main( void ) {
+ const float x[] = { -4.0f, -3.0f, -2.0f, -1.0f, 0.0f, 1.0f, 2.0f, 3.0f, 4.0f, 5.0f };
+
+ float y;
+ int i;
+ for ( i = 0; i < 10; i++ ) {
+ y = stdlib_base_heavisidef( x[ i ], STDLIB_BASE_HEAVISIDEF_CONTINUITY_HALF_MAXIMUM );
+ printf( "H(%f) = %f\n", x[ i ], y );
+ }
+}
+```
+
+
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+