fix: updated readme.md and benchmark.length.c

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Author: DhruvArvindSingh

lib/node_modules/@stdlib/stats/base/dmeanvarpn/README.md

@@ -239,6 +239,115 @@ console.log( out );
 
 <!-- /.examples -->
 
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dmeanvarpn.h"
+```
+
+#### stdlib_strided_dmeanvarpn( N, correction, \*X, strideX, \*Out, strideOut )
+
+Computes the [mean][arithmetic-mean] and [variance][variance] of a double-precision floating-point strided array using a two-pass algorithm.
+
+```c
+double x[] ={ 1.0, -2.0, 2.0 };
+double out[2];
+stdlib_strided_dmeanvarpn( x.length, 1, x, 1, out, 1 );
+// Out = [ ~0.3333, ~4.3333 ]
+```
+
+The function accepts the following arguments:
+
+-   **N**: `[in] CBLAS_INT` number of indexed elements.
+-   **correction**: `[in] double` degrees of freedom adjustment.
+-   **X**: `[in] double*` input array.
+-   **strideX**: `[in] CBLAS_INT` stride length for `X`.
+-   **Out**: `[in] double*` Output array.
+-   **strideOut**: `[in] CBLAS_INT` stride length for `Out`.
+
+```c
+double stdlib_strided_dmeanvarpn( const CBLAS_INT N, const double correction, const double *X, const CBLAS_INT strideX, double *Out, const CBLAS_INT strideOut );
+```
+
+#### stdlib_strided_dmeanvarpn_ndarray( N, correction, \*X, strideX, offsetX, \*Out, strideOut, offsetOut )
+
+Computes the [mean][arithmetic-mean] and [variance][variance] of a double-precision floating-point strided array using a two-pass algorithm and alternative indexing semantics.
+
+```c
+const double x[] = { 1.0, -2.0, 2.0 };
+
+stdlib_strided_dmeanvarpn_ndarray( x.length, 1, x, 1, 0, out, 1, 0 );
+// Out = [ ~0.3333, ~4.3333 ]
+```
+
+The function accepts the following arguments:
+
+-   **N**: `[in] CBLAS_INT` number of indexed elements.
+-   **correction**: `[in] double` degrees of freedom adjustment.
+-   **X**: `[in] double*` input array.
+-   **strideX**: `[in] CBLAS_INT` stride length for `X`.
+-   **offsetX**: `[in] CBLAS_INT` `X` starting index.
+-   **Out**: `[in] double*` Output array.
+-   **strideOut**: `[in] CBLAS_INT` stride length for `Out`.
+-   **offsetOut**: `[in] CBLAS_INT` `Out` starting index.
+
+```c
+double stdlib_strided_dmeankbn2_ndarray( const CBLAS_INT N, const double correction, const double *X, const CBLAS_INT strideX, const CBLAS_INT offsetX, double *Out, const CBLAS_INT strideOut, const CBLAS_INT offsetOut );
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+#include "stdlib/stats/base/dmeanvarpn.h"
+#include <stdio.h>
+
+int main( void ) {
+    // Create a strided array:
+    const double x[] = { 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0 };
+
+    // Specify the number of elements:
+    const CBLAS_INT N = 4;
+
+    // Specify the stride length:
+    const CBLAS_INT strideX = 2;
+
+    // Compute the arithmetic mean:
+    stdlib_strided_dmeanvarpn_ndarray( N, 1, x, 2, 1, out, 1, 0 );
+
+    // Print the result:
+    printf( "sample mean: %lf\n", out[ 0 ] );
+    printf( "sample variance: %lf\n", out[ 1 ] );
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
 * * *
 
 <section class="references">

lib/node_modules/@stdlib/stats/base/dmeanvarpn/benchmark/c/benchmark.length.c

@@ -97,9 +97,6 @@ static double rand_double( void ) {
 static double benchmark1( int iterations, int len ) {
 	double elapsed;
 	double out[ 2 ];
-		if(len <= 0){
-		return 0.0;
-	}
 	double x[ len ];
 	double t;
 	int i;
@@ -112,6 +109,7 @@ static double benchmark1( int iterations, int len ) {
 
 	t = tic();
 	for ( i = 0; i < iterations; i++ ) {
+		// cppcheck-suppress uninitvar
 		stdlib_strided_dmeanvarpn( len, 1, x, 1, out, 1 );
 		if ( out[ i%2 ] != out[ i%2 ] ) {
 			printf( "should not return NaN\n" );
@@ -135,9 +133,6 @@ static double benchmark1( int iterations, int len ) {
 static double benchmark2( int iterations, int len ) {
 	double elapsed;
 	double out[ 2 ];
-	if(len <= 0){
-		return 0.0;
-	}
 	double x[ len ];
 	double t;
 	int i;
@@ -150,6 +145,7 @@ static double benchmark2( int iterations, int len ) {
 
 	t = tic();
 	for ( i = 0; i < iterations; i++ ) {
+		// cppcheck-suppress uninitvar
 		stdlib_strided_dmeanvarpn_ndarray( len, 1, x, 1, 0, out, 1, 0 );
 		if ( out[ i%2 ] != out[ i%2 ] ) {
 			printf( "should not return NaN\n" );