Package mvpa :: Package misc :: Module transformers

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# Module transformers

source code

Simply functors that transform something.

Classes | [hide private]

| OverAxis Helper to apply transformer over specific axis
| DistPValue Converts values into p-values under vague and non-scientific assumptions

Functions | [hide private]

Absolute(x) Returns the elementwise absolute of any argument. | source code

OneMinus(x) Returns elementwise '1 - x' of any argument. | source code

Identity(x) Return whatever it was called with. | source code

FirstAxisMean(x) Mean computed along the first axis. | source code

FirstAxisSumNotZero(x) Sum computed over first axis of whether the values are not equal to zero. | source code

SecondAxisMean(x) Mean across 2nd axis | source code

SecondAxisSumOfAbs(x) Sum of absolute values along the 2nd axis | source code

SecondAxisMaxOfAbs(x) Max of absolute values along the 2nd axis | source code

GrandMean(x) Just what the name suggests. | source code

L2Normed(x, norm=1.0, reverse=False) Norm the values so that regular vector norm becomes `norm` | source code

L1Normed(x, norm=1.0, reverse=False) Norm the values so that L_1 norm (sum|x|) becomes `norm` | source code

RankOrder(x, reverse=False) Rank-order by value. Highest gets 0 | source code

ReverseRankOrder(x) Convinience functor | source code

Variables | [hide private]

| _DEV_DOC = ``...``

Imports: N, externals, warning, StateVariable, ClassWithCollections, debug

Function Details | [hide private]

### SecondAxisMean(x)

source code

Mean across 2nd axis

Use cases:
  - to combine multiple sensitivities to get sense about mean sensitivity across splits

### SecondAxisSumOfAbs(x)

source code

Sum of absolute values along the 2nd axis

Use cases:
  - to combine multiple sensitivities to get sense about what features are most influential

### L2Normed(x, norm=1.0, reverse=False)

source code

Norm the values so that regular vector norm becomes `norm`

More verbose: Norm that the sum of the squared elements of the returned vector becomes `norm`.

Variables Details | [hide private]

### _DEV_DOC

Value:

      """
      Follow the convetion that functions start with lower case, and classes
      with uppercase letter.
      """