# 'descriptive' package

## List of functions

This is a package for descriptive statistics, both univariate and multivariate. A list of available functions follow.

Functions for data manipulation:

**continuous_freq**: frequencies for continuous data
**discrete_freq**: frequencies for discrete data
**subsample**: subsample extraction
**transform_sample**: sample transformations

Univariate descriptive statistics:

**mean**: sample mean
**smin**: sample minimum value
**smax**: sample maximum value
**range**: the range
**noncentral_moment**: non central moment
**central_moment**: central moment
**var**: variance (divided by n)
**std**: standard deviation based on var
**var1**: variance (divided by n-1)
**std1**: standard deviation based on var1
**median**: median
**quantile**: p-quantile
**qrange**: interquartilic range
**skewness**: skewness coefficient
**kurtosis**: kurtosis coefficient
**harmonic_mean**: harmonic mean
**geometric_mean**: geometric mean
**cv**: variation coefficient
**mean_deviation**: mean deviation
**median_deviation**: median deviation
**pearson_skewness**: Pearson's skewness coefficient
**quartile_skewness**: quartilic skewness coefficient

Multivariate descriptive statistics:

**cov**: covariance matrix (divided by n)
**cov1**: covariance matrix (divided by n-1)
**cor**: correlation matrix
**global_variances**: gives a list with
- total variance
- mean variance
- generalized variance
- generalized standard deviation
- efective variance
- efective standard deviation

**list_correlations**: gives a list with
- precision matrix
- multiple correlation coefficients
- partial correlation coefficients

**principal_components**

Statistical diagrams:

**scatterplot**
**histogram**
**barsplot**
**boxplot**
**piechart**
**stemplot**
**starplot**

Inside Maxima, type **describe(function_name)$** to read the documentation on any function.

## Sessions

This is a collection of sessions made with package **descriptive**:

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