# General Functions

### Data transformation

|                                                                                            |                                                                                                 |
| ------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
| [`merge`](https://danfo.jsdata.org/api-reference/general-functions/danfo.merge)            | Merge DataFrame or named Series objects with a database-style join.                             |
| [`concat`](https://danfo.jsdata.org/api-reference/general-functions/danfo.concat)          | Concatenate danfo objects along a particular axis with optional set logic along the other axes. |
| [`getDummies`](https://danfo.jsdata.org/api-reference/general-functions/danfo.get_dummies) | Convert categorical variable into dummy/indicator variables. Similar to OneHotEncoding          |

### Data Normalization

| [LabelEncoder](https://danfo.jsdata.org/api-reference/general-functions/danfo.labelencoder)     | Encode target labels with value between 0 and n\_classes-1.            |
| ----------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------- |
| [OneHotEncoder](https://danfo.jsdata.org/api-reference/general-functions/danfo.onehotencoder)   | Encode categorical features as a one-hot numeric array.                |
| [StandardScaler](https://danfo.jsdata.org/api-reference/general-functions/danfo.standardscaler) | Standardize features by removing the mean and scaling to unit variance |
| [`MinMaxScaler`](https://danfo.jsdata.org/api-reference/general-functions/danfo.minmaxscaler)   | Transform features by scaling each feature to a given range            |

### Working with DateTime

| [`toDateTime`](https://danfo.jsdata.org/api-reference/general-functions/danfo.to_datetime) | Convert argument to datetime.                                                                        |
| ------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------- |
| [`dateRange`](https://danfo.jsdata.org/api-reference/general-functions/danfo.date_range)   | Return a fixed frequency Datetime Index.                                                             |
| [Dt](https://danfo.jsdata.org/api-reference/general-functions/danfo.dt)                    | A class that converts strings of Date Time into a usable format, by exposing various helper methods. |

### Streaming Functions

| [streamCSV](https://danfo.jsdata.org/api-reference/general-functions/danfo.streamcsv)                                        | A function that loads a CSV object as a stream, returning intermediate rows as a DataFrame.             |
| ---------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
| [streamJSON](https://danfo.jsdata.org/api-reference/general-functions/danfo.streamjson)                                      | A function that loads a JSON object as a stream, returning intermediate rows as a DataFrame.            |
| [streamCSVTransformer](https://danfo.jsdata.org/api-reference/general-functions/danfo.streamcsvtransformer)                  | A function that loads a CSV object as a stream, and applies a map-reduce function to intermediate rows. |
| [convertFunctionTotransformer](https://danfo.jsdata.org/api-reference/general-functions/danfo.-convertfunctiontotransformer) | A function to convert any JS function into a Stream transformer.                                        |

### Utility and Configurations

| [Utils](https://danfo.jsdata.org/api-reference/general-functions/danfo.utils)                                                  | A utility class with helper methods mostly used internally. |
| ------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------- |
| [Config](https://github.com/javascriptdata/danfojs-doc/blob/master/api-reference/general-functions/broken-reference/README.md) | Base configuration class for NDframe objects                |

### Strings

| [Str](https://danfo.jsdata.org/api-reference/general-functions/danfo.str) | A class that converts strings into a usable format, by exposing various helper methods. |
| ------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- |

### Internal Libs

| [tensoflow](https://danfo.jsdata.org/api-reference/general-functions/danfo.tensorflow) | Exported Tensorflow\.js library. This helps to avoid duplicated Tensorflow\.js library use. |
| -------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------- |