nuget
R language liked dataframe object
DataFrame
01 Syntax
Microsoft.VisualBasic.Data.Framework.DataFrame
02 Methods
| Name | Overloads | Summary |
|---|---|---|
| delete | 1 | removes a column field from current dataframe object by a given field name |
| add | 4 | add a new feature column into current dataframe object |
| row | 1 | get row by index |
| foreachRow | 2 | iterates through all data rows inside current dataframe object |
| slice | 1 | slice the dataframe row by a collection of the given row names labels |
| Union | 1 | current dataframe object append the additional data to right side and then create a new dataframe |
| ToString | 1 | |
| read_csv | 2 | |
| read_arff | 1 | |
| write_arff | 1 | |
| GetDimension | 1 | |
| GenericEnumerator | 1 | |
| FromRows | 1 |
03 Properties
| Name | Overloads | Summary |
|---|---|---|
| features | 1 | the dataframe columns |
| name | 1 | the name of current dataset |
| description | 1 | the comment text about this dataset |
| rownames | 1 | get the row names labels in current dataframe object, the size of this row names vector should be equals to the number of rows in current dataframe object. |
| dims | 1 | the dimension size of current dataframe object, with data axis dimension mapping of: 1. |
| featureNames | 1 | the column field names |
| nsamples | 1 | the n rows of the matrix |
| nfeatures | 1 | get the number of the feature columns inside current dataframe object |
| Item | 2 | make dataframe column fields projection |
| featureSet | 1 |
04 Members
delete(
String)removes a column field from current dataframe object by a given field name
Parameters
| Name | Type | Description |
|---|---|---|
featureName | String | - |
add(
String, IEnumerable(Of Double))add a new feature column into current dataframe object
Parameters
| Name | Type | Description |
|---|---|---|
featureName | String | - |
v | IEnumerable(Of Double) | a data field column data in double numeric type |
add(
String, IEnumerable(Of Single))add a new feature column into current dataframe object
Parameters
| Name | Type | Description |
|---|---|---|
featureName | String | - |
v | IEnumerable(Of Single) | a data field column data in double numeric type |
add(
String, IEnumerable(Of Int32))add a new feature column into current dataframe object
Parameters
| Name | Type | Description |
|---|---|---|
featureName | String | - |
v | IEnumerable(Of Int32) | a data field column data in integer type |
add(FeatureVector)
add a new feature column into current dataframe object
Parameters
| Name | Type | Description |
|---|---|---|
feature | FeatureVector | - |
row(
Int32)get row by index
Parameters
| Name | Type | Description |
|---|---|---|
i | Int32 | - |
Returns
A row data without row names
foreachRow
iterates through all data rows inside current dataframe object
slice(
IEnumerable(Of String))slice the dataframe row by a collection of the given row names labels
Remarks
this function could be used for make dataframe rows re-order by rownames
Parameters
| Name | Type | Description |
|---|---|---|
rownames | IEnumerable(Of String) | - |
Union(DataFrame)
current dataframe object append the additional data to right side and then create a new dataframe
Parameters
| Name | Type | Description |
|---|---|---|
append | DataFrame | - |
features
the dataframe columns
name
the name of current dataset
description
the comment text about this dataset
rownames
get the row names labels in current dataframe object, the size of this row names vector should be equals to the number of rows in current dataframe object.
dims
the dimension size of current dataframe object, with data axis dimension mapping of:
- width: feature size, column size
- height: sample size, row size
featureNames
the column field names
nsamples
the n rows of the matrix
nfeatures
get the number of the feature columns inside current dataframe object
Item(
String)get a column field from dataframe by given feature column name
Parameters
| Name | Type | Description |
|---|---|---|
featureName | String | - |
Item(
IEnumerable(Of String))make dataframe column fields projection
Parameters
| Name | Type | Description |
|---|---|---|
cols | IEnumerable(Of String) | - |
Returns
a subset of the dataframe value with fields projection
featureSet
foreachRow(
Func(Of NamedCollection(Of Object), NamedCollection(Of T)))ToString()
read_csv(
String, Char, Boolean, Encodings)read_arff(
String)write_arff(DataFrame,
Stream)read_csv(
Stream, Char, Boolean, Encodings, Boolean)GetDimension(
String)GenericEnumerator()
FromRows(
IEnumerable(Of NamedCollection(Of T)), IEnumerable(Of String))