# 2009.05.12 Variable distributions after LDA at 70% efficiency

### Cut optimization with Fisher's LDA classifier

For this post LDA results with Set1 and Set2 has been used

Note, that LDA for various pre-shower bins is trained independetly

pdf-links with results for **pre1=0 and pre2=0** (pre-shower bin 1):

- before LDA cut (figures are not sorted)
- after LDA cut @70% efficiency for Set 2 (figures are not sorted)

Figures below are for **0.004<pre-shower1<0.01** (pre-shower bin 4).

Photon pt cut: pt> 7, pre-shower bin: 0.004 < pre1 < 0.01

LDA cut with efficiency @ 70%

### Set1 vs. Set2

What is added in Set2 compared to Set1:

smaller cluster size information (r2x1, r2x2), post-shower energy

**Figure 1:** r2x1

before LDA cut

LDA cut for Set1

LDA cut for Set2

**Figure 2:** r2x2

before LDA cut

LDA cut for Set1

LDA cut for Set2

**Figure 3:** r3x3

before LDA cut

LDA cut for Set1

LDA cut for Set2

**Figure 4:** Residual distance

before LDA cut

LDA cut for Set1

LDA cut for Set2

### Other variables with LDA Set2 cut

Note: Only plos for LDA cut @70 efficiency for Set2 are shown

**Figure :** number of charge particles around photon

**Figure 5:** number of EEMC tower around photon

**Figure 6:** number of BEMC tower around photon

**Figure 7:** photon-jet pt balance

**Figure 8:** SMD energy in 5 centrapl strips

**Figure 9:** SMD energy in 25 central strips: u and v plane separately (plot for V plane)

**Figure 13:** tower energy in r=0.7 radius

**Figure 14:** 3x3 pre-shower1 energy

**Figure 15:** 3x3 pre-shower2 energy

**Figure 16:** 3x3 post-shower energy

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