# Ticket #697 (closed defect: fixed)

## Sometimes TRI2 and SLIMPlugin results agree, except for chi-square

Reported by: | aivar | Owned by: | aivar |
---|---|---|---|

Priority: | major | Milestone: | slimplugin1.1 |

Component: | slim-plugin | Severity: | serious |

Keywords: | Cc: | ||

Blocked By: | Blocking: | #674 |

### Description

Sometimes the results are in agreement, but the reduced chi-square is not in agreement.

## Change History

### comment:2 Changed 8 years ago by aivar

Another point (155, 230) exhibits the same behavior, results agree except for chisquare for Poisson Data and Poisson Fit.

### comment:3 Changed 8 years ago by aivar

Note this bug covers fitting without an Excitation curve loaded.

### comment:5 Changed 8 years ago by aivar

100611-YG-256.sdt at (146, 230) cursors 0.0/2.15/11.23 Poisson Data:

SLIM Plugin: A 71.28562 T 2.092129 Z 0.99059045 X2 0.32557997 TRI2: A 69.08 T 2.13 Z 0.92 X2 1.007875

In other words for TRI2 cursors 0.0/2.1484/11.2305 and 0.0/2.15/11.23 are equivalent, for SLIM Plugin they are not. Suggests a rounding technique discrepancy.

### comment:6 Changed 8 years ago by aivar

Comment to last comment:

I went from 0.0/2.1484/11.2305 to 0.0/2.15/11.23 because TRI2 is now truncating cursors to 2 places. (Odd because I used to enter more digits--this is with my XP VM and TRI2 Version 2.5.2.1 FI_port.)

### comment:7 Changed 8 years ago by aivar

With my Windows 7 VM and TRI2 version 2.731 I get:

0/2.15/11.23 A 71.286 T 2.092 Z 0.991 X2 1.015688

0/2.1484/11.2305 A 69.081 T 2.135 Z 0.922 X2 1.007875

So "for TRI2 cursors 0.0/2.1484/11.2305 and 0.0/2.15/11.23 are equivalent" from two comments above only applies for version 2.5.2.1 (on XP). They are not equivalent for 2.731 (on Windows 7). In other words latest TRI2 is consistent with SLIM Plugin, except for this chisquare being off issue.

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For 100611-YG-256.sdt which I got from Jimmy Fong, with cursors at 0.0/2.1484/11.2305 for point (146, 230) RLD/LMA fit I get:

Gaussian noise is good

SLIM Plugin A 73,23523 T 2.0873063 Z 0.94988865 X2 0.85290354

TRI2 A 73.24 T 2.09 Z 0.95 X2 0.852904

Poisson Data is bad

SLIM Plugin A 69.08094 T 2.1349077 Z 0.9221971 X2 0.32471284 X

TRI2 A 69.08 T 2.13 Z 0.92 X2 1.007875 X

Poisson Fit is bad

SLIM Plugin A 75.977646 T 2.0332031 Z 1.039639 X2 0.33459756 X

TRI2 A 75.98 T 2.03 Z 1.04 X2 0.851691 X

Maximum Likelihood Estimation is good

SLIM Plugin A 73.182625 T 2.0885024 Z 0.9476004 X2 0.9309332

TRI2 A 73.19 (bit of a rounding error?) T 2.09 Z 0.95 X2 0.930933 TRI2