wX

C++ Function Reference

1 Signature

Eigen::MatrixXd BigDataStatMeth::wX(const Eigen::MatrixXd &X, const Eigen::MatrixXd &w)

2 Description

Compute diagonal-matrix product wX.

3 Parameters

X (const Eigen::MatrixXd &): Input matrix
w (const Eigen::MatrixXd &): Matrix representing diagonal matrix

4 Returns

Diagonal-matrix product wX

5 Details

Computes the product of a diagonal matrix with a matrix.

6 Call Graph

7 Source Code

Implementation

File: inst/include/memAlgebra/memOptimizedProducts.hpp • Lines 240-244

inline Eigen::MatrixXd wX(const Eigen::MatrixXd& X, const Eigen::MatrixXd& w) 
{
    Eigen::MatrixXd wX = w.array().matrix().asDiagonal()*X;
    return (wX);
}

8 Usage Example

#include "BigDataStatMeth.hpp"

// Example usage
auto result = wX(...);

---
title: "wX"
subtitle: "C++ Function Reference"
---

## Signature

```cpp
Eigen::MatrixXd BigDataStatMeth::wX(const Eigen::MatrixXd &X, const Eigen::MatrixXd &w)
```

## Description

Compute diagonal-matrix product wX.

## Parameters

- `X` (`const Eigen::MatrixXd &`): Input matrix
- `w` (`const Eigen::MatrixXd &`): Matrix representing diagonal matrix

## Returns

Diagonal-matrix product wX

## Details

Computes the product of a diagonal matrix with a matrix.

## Call Graph

::: {.diagram-section}
<object type="image/svg+xml" data="images/namespace_big_data_stat_meth_afab3d807820d9795b0491e14cef6de16_cgraph.svg" class="class-diagram">
  <img src="images/namespace_big_data_stat_meth_afab3d807820d9795b0491e14cef6de16_cgraph.svg" alt="Function dependencies"/>
</object>
:::

## Source Code

::: {.callout-note collapse="true"}
### Implementation

**File:** `inst/include/memAlgebra/memOptimizedProducts.hpp` • **Lines 240-244**

```cpp
inline Eigen::MatrixXd wX(const Eigen::MatrixXd& X, const Eigen::MatrixXd& w) 
{
    Eigen::MatrixXd wX = w.array().matrix().asDiagonal()*X;
    return (wX);
}
```
:::

## Usage Example

```cpp
#include "BigDataStatMeth.hpp"

// Example usage
auto result = wX(...);
```