Table 5.

Experiments 5: For each tissue class the five most important features with respect to the permutation accuracy criterion are listed by their m/z-position in Da and their corresponding importance score (given in brackets). In addition, the overall most important features and their interpretation (if available) are given (also cf. fig. 7).

	tissue class
rank	necrotic	viable	gelatine	interface	glass/hole	overall	interpretation
1	23.3 (0.092)	39.0 (0.052)	70.0 (0.144)	23.3 (0.131)	112.9 (0.102)	114.9 (0.058)	indium
2	114.9 (0.080)	23.3 (0.050)	58.1 (0.097)	184.0 (0.099)	114.9 (0.087)	23.3 (0.056)	sodium
3	39.0 (0.049)	114.9 (0.032)	184.0 (0.091)	114.9 (0.078)	118.0 (0.070)	70.0 (0.056)
4	184.0 (0.035)	70.0 (0.031)	44.1 (0.045)	39.0 (0.051)	246.8 (0.064)	184.0 (0.050)	phosphocholine
5	44.1 (0.032)	58.1 (0.027)	104.1 (0.044)	58.1 (0.048)	136.8 (0.042)	58.1 (0.041)