Statistics Toolbox™

summary - Summary statistics for dataset array

Class

@dataset

Syntax

summary(A)

Description

summary(A) displays summaries of the variables in the dataset array A.

Summary information depends on the type of the variables in the data set:

For numerical variables, summary computes a five-number summary of the data, giving the minimum, the first quartile, the median, the third quartile, and the maximum.
For logical variables, summary counts the number of trues and falses in the data.
For categorical variables, summary counts the number of data at each level.

Examples

Example 1

Summarize Fisher's iris data:

load fisheriris
species = nominal(species);
data = dataset(species,meas);
summary(data)
species: [150x1 nominal]
  setosa   versicolor   virginica
      50           50          50
meas: [150x4 double]
  min       4.3000         2         1    0.1000 
  1st Q     5.1000    2.8000    1.6000    0.3000 
  median    5.8000         3    4.3500    1.3000 
  3rd Q     6.4000    3.3000    5.1000    1.8000 
  max       7.9000    4.4000    6.9000    2.5000

Example 2

Summarize the data in hospital.mat:

load hospital
summary(hospital)

A dataset array created from the data file hospital.dat.
It has the first column of that file as observations 
names, and has had several other columns converted to a 
more convenient form.

LastName: [100x1 cell string]
Sex: [100x1 nominal]
   Female    Male 
       53      47 
Age: [100x1 double, Units = Yrs]
   min    1st Q    median    3rd Q    max 
    25       32        39       44     50 
Weight: [100x1 double, Units = Lbs]
   min    1st Q       median      3rd Q       max 
   111    130.5000    142.5000    180.5000    202 
Smoker: [100x1 logical]
   true    false 
     34       66 
BloodPressure: [100x2 double, Units = mm Hg]
   min            109         68 
   1st Q     117.5000    77.5000 
   median         122    81.5000 
   3rd Q     127.5000         89 
   max            138         99 
Trials: [100x1 cell, Units = Counts]