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DataFrame

typedef struct {
    double *data;           
    int numRows;                
    int numCols;            
    char **featureNames;    
} DataFrame;

Represents a matrix with names for each column.

Data is stored as a row-major flattened array.

info

Added in version 0.0.0

Struct Members​

  • double* data ← Flattened array
  • int numRows ← Number of rows (samples)
  • int numCols ← Number of columns (features) per row
  • char** featureNames ← Array of column/feature names

  • DF_addColumn → int
    Adds a single column/feature to an existing DataFrame.
    Params: DataFrame* df double* data char* name

  • DF_free → void
    Frees all allocated memory by the DataFrame.
    Params: DataFrame* df

  • DF_fromArray → DataFrame*
    Creates a DataFrame with one feature from the given array.
    Params: double* data int numRows char* name

Example​

#include <ml-in-c/datatypes/dataframe.h>

int main() {
     // Create from array
     double data[] = {1, 2, 3};
     DataFrame *df = DF_fromArray(data, 3, "feature1");

     // Add a column
     double newData[] = {4, 5, 6};
     DF_addColumn(df, newData, "feature2");

     // Free array from memory
     DF_free(df);

     return 0;
}