Shortcut: SKETCHMAP
| Module | dimred |
|---|---|
| Description | Usage |
| Construct a sketch map projection of the input data |   |
| output value | type |
| the sketch-map projection of the input points | matrix |
Output components
This action can calculate the values in the following table when the associated keyword is included in the input for the action. These values can be referenced elsewhere in the input by using this Action's label followed by a dot and the name of the value required from the list below.
| Name | Type | Keyword | Description |
|---|---|---|---|
| osample | matrix | PROJECT_ALL | the out-of-sample projections |
Further details and examples
Text from manual goes here
Syntax
The following table describes the keywords and options that can be used with this action
| Keyword | Type | Default | Description |
|---|---|---|---|
| NLOW_DIM | compulsory | none | number of low-dimensional coordinates required |
| ARG | compulsory | none | the matrix of high dimensional coordinates that you want to project in the low dimensional space |
| HIGH_DIM_FUNCTION | compulsory | none | the parameters of the switching function in the high dimensional space |
| LOW_DIM_FUNCTION | compulsory | none | the parameters of the switching function in the low dimensional space |
| CGTOL | compulsory | 1E-6 | The tolerance for the conjugate gradient minimization that finds the projection of the landmarks |
| MAXITER | compulsory | 1000 | maximum number of optimization cycles for optimisation algorithms |
| NCYCLES | compulsory | 0 | The number of cycles of pointwise global optimisation that are required |
| BUFFER | compulsory | 1.1 | grid extent for search is (max projection - minimum projection) multiplied by this value |
| CGRID_SIZE | compulsory | 10 | number of points to use in each grid direction |
| FGRID_SIZE | compulsory | 0 | interpolate the grid onto this number of points -- only works in 2D |
| OS_CGTOL | compulsory | 1E-6 | The tolerance for the conjugate gradient minimization that finds the out of sample projections |
| SMACTOL | compulsory | 1E-4 | the tolerance for the smacof algorithm |
| SMACREG | compulsory | 0.001 | this is used to ensure that we don't divide by zero when updating weights for SMACOF algorithm |
| WEIGHTS | optional | not used | a vector containing the weights of the points |
| PROJECT_ALL | optional | false | if the input are landmark coordinates then project the out of sample configurations |
| USE_SMACOF | optional | false | find the projection in the low dimensional space using the SMACOF algorithm |