What does the header information in MaxEnt1 processing results mean? - WKB92924
ENVIRONMENT
- MassLynx
- Maxent 1
ANSWER
| IntactAntibody2 | Sample file name |
| (10.463) | Retention time (min) of chromatographic peak |
| M1 | MaxEnt1 |
| Ev-337116 | Evidence * |
| It39 | Number of iterations to convergence |
| Gs | Uniform Gaussian damage model selected |
| 1.00 | Spectrum peak width at half height |
| 1000:4600 | Auto processing input m/z range |
| 0.75 | Resolution |
| L30 and R30 | Minimum intensity, left and right |
| Cm(186:299) | Combined spectra (scan numbers 186 to 299) |
* When the MaxEnt 1 algorithm makes an iteration, the omega value gets a little closer to 1 (as it moves towards convergence). The evidence value also changes with each iteration. For example, at iteration 15 (see below) evidence is -411550, but at convergence in iteration 39 (see above), evidence = -337116. Omega is an indicator of when the regularization parameter or balance (alpha) between the entropy and the fit to the data is optimal. Omega = 1 is one of the required conditions for convergence. Evidence in Bayesian calculations indicates the ability of the model to predict the data, integrating over any allowed variability in the model. It is useful when comparing different models (for example, different peak widths). The evidence after an iteration is conditioned on the current value of alpha and is reported in decibels. A completely flat spectrum will have Evidence = 1, and a spectrum with peaks will have a negative value between 0 and negative infinity.
ADDITIONAL INFORMATION
id92924, MAXENTV4, MAXENTV41, MLYNX, MLYNXV41, SUPMM