Statistics Toolbox™

summary - Summary statistics for categorical array

Class

@categorical

Syntax

summary(A)
C = summary(A)
[C,labels] = summary(A)

Description

summary(A) displays the number of elements in the categorical array A equal to each of the possible levels in A. If A contains any undefined elements, the output also includes the number of undefined elements.

C = summary(A) returns counts of the number of elements in the categorical array A equal to each of the possible levels in A. If A is a matrix or N-dimensional array, C is a matrix or array with rows corresponding to the levels of A. If A contains any undefined elements, C contains one more row than the number of levels of A, with the number of undefined elements in c(end) or c(end,:).

[C,labels] = summary(A) also returns the list of categorical level labels corresponding to the counts in C.

Example

Count the number of patients in each age group in the data in hospital.mat:

load hospital
edges = 0:10:100;
labels = strcat(num2str((0:10:90)','%d'),{'s'});
AgeGroup = ordinal(hospital.Age,labels,[],edges);
[c,labels] = summary(AgeGroup);

Table = dataset({labels,'AgeGroup'},{c,'Count'});
Table(3:6,:)
ans = 
    AgeGroup     Count
    '20s'        15   
    '30s'        41   
    '40s'        42   
    '50s'         2

See Also

islevel, ismember, levelcounts

stepwisefit

summary