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Object Description

Source: R/AllGenerics.R, R/summary.R
describe.Rd

Object Description

Usage

# S4 method for class 'CA'
describe(x, ...)

# S4 method for class 'PCA'
describe(x, ...)

Arguments

x

A CA, MCA or PCA object.

...

Further parameters to be passed to cat().

Value

describe() is called for its side-effects. Invisibly returns x.

See also

Other summary: summary(), tidy()

Author

N. Frerebeau

Examples

## Data from Lebart et al. 2006, p. 170-172
data("colours")

## Compute correspondence analysis
X <- ca(colours)

## Rows summary
summary(X, margin = 1)
#> # Correspondence Analysis (CA)
#> 
#> ## Eigenvalues
#> 
#> |    | eigenvalues | variance | cumulative |
#> | :- | ----------: | -------: | ---------: |
#> | F1 |       0.209 |   89.373 |     89.373 |
#> | F2 |       0.022 |    9.515 |     98.888 |
#> | F3 |       0.003 |    1.112 |        100 |
#> 
#> ## Active rows
#> 
#> |          | inertia | F1_coord | F1_contrib | F1_cos2 | F2_coord | F2_contrib | F2_cos2 |
#> | :------- | ------: | -------: | ---------: | ------: | -------: | ---------: | ------: |
#> | marron   | 250.487 |   -0.492 |     43.116 |   0.967 |   -0.088 |     13.042 |   0.031 |
#> | noisette |  83.321 |   -0.213 |      3.401 |   0.542 |    0.167 |     19.804 |   0.336 |
#> | vert     | 148.785 |    0.162 |      1.355 |   0.176 |    0.339 |      55.91 |   0.773 |
#> | bleu     | 306.566 |    0.547 |     52.128 |   0.977 |   -0.083 |     11.244 |   0.022 |

## Columns summary
summary(X, margin = 2)
#> # Correspondence Analysis (CA)
#> 
#> ## Eigenvalues
#> 
#> |    | eigenvalues | variance | cumulative |
#> | :- | ----------: | -------: | ---------: |
#> | F1 |       0.209 |   89.373 |     89.373 |
#> | F2 |       0.022 |    9.515 |     98.888 |
#> | F3 |       0.003 |    1.112 |        100 |
#> 
#> ## Active columns
#> 
#> |         | inertia | F1_coord | F1_contrib | F1_cos2 | F2_coord | F2_contrib | F2_cos2 |
#> | :------ | ------: | -------: | ---------: | ------: | -------: | ---------: | ------: |
#> | brun    | 303.812 |   -0.505 |     22.246 |   0.838 |   -0.215 |     37.877 |   0.152 |
#> | chatain |  25.428 |   -0.148 |      5.086 |   0.864 |    0.033 |      2.319 |   0.042 |
#> | roux    | 125.862 |    -0.13 |      0.964 |   0.133 |     0.32 |     55.131 |   0.812 |
#> | blond   |  702.91 |    0.835 |     71.704 |   0.993 |    -0.07 |      4.673 |   0.007 |