VectortoOrderedMap_SNP_counts

C++ Function Reference

1 Signature

std::map< double, double > BigDataStatMeth::VectortoOrderedMap_SNP_counts(Eigen::VectorXd vdata)

2 Description

Converts a vector to an ordered map of value frequencies.

3 Parameters

vdata (Eigen::VectorXd): Input vector of values

4 Returns

std::map<double, double> Map of value-frequency pairs

5 Details

Creates a map where keys are unique values from the input vector and values are their frequencies of occurrence.

6 Caller Graph

7 Source Code

Implementation

File: inst/include/hdf5Utilities/hdf5ImputeData.hpp • Lines 101-128

inline std::map<double, double> VectortoOrderedMap_SNP_counts( Eigen::VectorXd  vdata)
    {
        std::map<double, double> mapv;
        
        try 
        {
            int position = 0;
            std::vector<double> v(vdata.data(), vdata.data()+vdata.size());
            
            std::sort(v.begin(), v.end() ); // Sort vector to optimize search and count
            
            for (size_t i = 0; i <=  *std::max_element(v.begin(), v.end()) ; ++i)  
            {
                double mycount = std::count(v.begin() + position, v.end(), i);
                mapv[i] = mycount;
                position = position + mycount;
            }
            
        } catch(std::exception &ex) {
            Rf_error( "c++ exception VectortoOrderedMap_SNP_counts : %s", ex.what());
            return std::map<double, double>();
        } catch(...) { 
            Rf_error("c++ exception VectortoOrderedMap_SNP_counts (unknown reason)"); 
            return std::map<double, double>();
        } 
        
        return mapv;
    }

8 Usage Example

#include "BigDataStatMeth.hpp"

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

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

## Signature

```cpp
std::map< double, double > BigDataStatMeth::VectortoOrderedMap_SNP_counts(Eigen::VectorXd vdata)
```

## Description

Converts a vector to an ordered map of value frequencies.

## Parameters

- `vdata` (`Eigen::VectorXd`): Input vector of values

## Returns

std::map<double, double> Map of value-frequency pairs

## Details

Creates a map where keys are unique values from the input vector and values are their frequencies of occurrence.

## Caller Graph

::: {.diagram-section}
<object type="image/svg+xml" data="images/namespace_big_data_stat_meth_a85739577b75b708ecbd87fe09f5182e6_icgraph.svg" class="class-diagram">
  <img src="images/namespace_big_data_stat_meth_a85739577b75b708ecbd87fe09f5182e6_icgraph.svg" alt="Function dependencies"/>
</object>
:::

## Source Code

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

**File:** `inst/include/hdf5Utilities/hdf5ImputeData.hpp` • **Lines 101-128**

```cpp
inline std::map<double, double> VectortoOrderedMap_SNP_counts( Eigen::VectorXd  vdata)
    {
        std::map<double, double> mapv;
        
        try 
        {
            int position = 0;
            std::vector<double> v(vdata.data(), vdata.data()+vdata.size());
            
            std::sort(v.begin(), v.end() ); // Sort vector to optimize search and count
            
            for (size_t i = 0; i <=  *std::max_element(v.begin(), v.end()) ; ++i)  
            {
                double mycount = std::count(v.begin() + position, v.end(), i);
                mapv[i] = mycount;
                position = position + mycount;
            }
            
        } catch(std::exception &ex) {
            Rf_error( "c++ exception VectortoOrderedMap_SNP_counts : %s", ex.what());
            return std::map<double, double>();
        } catch(...) { 
            Rf_error("c++ exception VectortoOrderedMap_SNP_counts (unknown reason)"); 
            return std::map<double, double>();
        } 
        
        return mapv;
    }
```
:::

## Usage Example

```cpp
#include "BigDataStatMeth.hpp"

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