# bdm::EpdfDS Class Reference

Simulate data from a static pdf (epdf). More...

## Detailed Description

Simulate data from a static pdf (epdf).

Trivial example of a data source, could be used for tests of some estimation algorithms. For example, simulating data from a mixture model and feeding them to mixture model estimators.

`#include <datasources.h>`

List of all members.

## Public Member Functions
void | step ()
| Moves from to , i.e. perfroms the actions and reads response of the system.
void | getdata (vec &dt_out)
| Returns full vector of observed data=[output, input].
void | getdata (vec &dt_out, const ivec &ids)
| Returns data records at indeces.
const RV & | _drv () const
| access function
void | from_setting (const Setting &set)
void | validate ()
| This method TODO.
virtual int | max_length ()
| Returns maximum number of provided data, by default it is set to maximum allowed length, shorter DS should overload this method! See, MemDS.max_length().
virtual void | write (const vec &ut)
| Accepts action variable and schedule it for application.
virtual void | write (const vec &ut, const ivec &indeces)
| Accepts action variables at specific indeces.
virtual void | log_add (logger &L)
| Register DS for logging into logger L.
virtual void | logit (logger &L)
| Register DS for logging into logger L.
const RV & | _urv () const
| access function
const RV & | _yrv () const
| access function
virtual void | set_drv (const RV &yrv, const RV &urv)
| set random variables
virtual string | to_string ()
| This method returns a basic info about the current instance.
virtual void | to_setting (Setting &set) const
| This method save all the instance properties into the Setting structure.
## Protected Attributes
shared_ptr< epdf > | iepdf
| internal pointer to epdf from which we samplecond
vec | dt
| internal storage of data sample
int | dtsize
| size of data returned by `getdata()`
int | utsize
| size of data
int | ytsize
| size of output
RV | Drv
| Description of data returned by `getdata()`.
RV | Urv
| Description of data witten by by `write()`.
RV | Yrv
| Description of output data.
ivec | LIDs
| Remember its own index in Logger L, [0=dt, 1=ut].

## Member Function Documentation

void bdm::EpdfDS::from_setting | ( | const Setting & | set | ) | `[inline, virtual]`

                    class = "EpdfDS";
                    epdf = {class="epdf_offspring", ...}// uncondtitional density to sample from

Reimplemented from bdm::root.

References bdm_assert, dt, bdm::DS::dtsize, iepdf, bdm::DS::set_drv(), bdm::DS::utsize, and validate().

The documentation for this class was generated from the following file:

- datasources.h