# get graph of the twelve derivations in unity
**URL:** https://discourse.kitware.com/t/get-graph-of-the-twelve-derivations-in-unity/534
**Category:** Pulse Physiology Engine
**Created:** [September 13, 2020, 10:03am UTC](https://discourse.kitware.com/t/get-graph-of-the-twelve-derivations-in-unity/534 "2020-09-13T10:03:35Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@victor.vicente](https://discourse.kitware.com/u/victor.vicente)
#### Post date: [September 13, 2020, 10:03am UTC](https://discourse.kitware.com/t/get-graph-of-the-twelve-derivations-in-unity/534/1 "2020-09-13T10:03:35Z")
I have been playing with the asset to understand it correctly through the different demo scenarios that are included, and I really see that it is relatively easy to use even for an inexperienced programmer like me, but I am unable to visualize any derivation other than the 3 and I don’t understand what I must be doing wrong. any key for a newbie in programming?
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### Author:  [@abray](https://discourse.kitware.com/u/abray)
#### Post date: [September 24, 2020, 1:49pm UTC](https://discourse.kitware.com/t/get-graph-of-the-twelve-derivations-in-unity/534/2 "2020-09-24T13:49:48Z")
Hi @victor.vicente
Are you using the Pulse or the VTK Unity asset?
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### Author:  [@victor.vicente](https://discourse.kitware.com/u/victor.vicente)
#### Post date: [September 24, 2020, 2:55pm UTC](https://discourse.kitware.com/t/get-graph-of-the-twelve-derivations-in-unity/534/3 "2020-09-24T14:55:34Z")
Sorry I didn’t specify it, I was looking for it in Pulse asset
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### Author:  [@abray](https://discourse.kitware.com/u/abray)
#### Post date: [September 24, 2020, 3:30pm UTC](https://discourse.kitware.com/t/get-graph-of-the-twelve-derivations-in-unity/534/4 "2020-09-24T15:30:21Z")
Ok, That is me
To use the Pulse API you should have a good understanding of the the [Common Data Model](https://pulse.kitware.com/_c_d_m.html) and its [structures](https://pulse.kitware.com/_c_d_m_tables.html), as well as the [Pulse interface](https://pulse.kitware.com/physeng.html).
The 12 `derivations` are referred to as Data Requests
Pulse computes a LOT of data, and you will need to enumerate which properties you want from Pulse via a [DataRequest](https://gitlab.kitware.com/physiology/engine/-/blob/master/src/csharp/howto/HowTo_EngineUse.cs#L41)
[SEDataRequest has a few methods](https://gitlab.kitware.com/physiology/engine/-/blob/master/src/csharp/pulse/cdm/engine/SEDataRequest.cs#L57) for you to use in specifying what data you want to pull.
The string property name associated with these various methods name and can be one from :
- [A Physiology or Environment Property](https://pulse.kitware.com/physeng.html#SystemsInterface)
- [A Compartment Property](https://pulse.kitware.com/physeng.html#CompartmentsInterface)
- [A Substance Property](https://pulse.kitware.com/physeng.html#SubstancesInterface)
I would suggest you start to learn the API by looking at this [HowTo](https://gitlab.kitware.com/physiology/engine/-/blob/master/src/cpp/howto/HowTo-EngineUse.cpp)
There are many more C++ Examples in this directory, Since C++ is the native language there are generally more examples.
The way the Pulse API is structured, these examples translate very easily to the Pulse C# API
You can see C# examples [here](https://gitlab.kitware.com/physiology/engine/-/tree/master/src/csharp/howto)
Sorry it took so long to find this.
Once you read though the provided material, I suggest you post specific questions to the Pulse discourse forum [here](https://discourse.kitware.com/c/pulse-physiology-engine)