Make sure that you are familiar with Displaying Indicators before proceeding with this section.

BellaDati allows you to apply statistical functions on existing indicators.

## Available Functions

Following functions are currently available in BellaDati:

**corr(Y, X)**Correlation Coefficient**covar_pop(Y, X)**Population Covariance**covar_sample(Y, X)**Sample Covariance**regr_avgx(Y, X)**Average of the independent variable (sum(X)/N)**regr_avgy(Y, X)**Average of the dependent variable (sum(Y)/N)**regr_count(Y, X)**Number of input rows in which both expressions are nonnull**regr_intercept(Y, X)**y-intercept of the least-squares-fit linear equation determined by the (X, Y) pairs**regr_r2(Y, X)**Square of the correlation coefficient**regr_slope(Y, X)**slope of the least-squares-fit linear equation determined by the (X, Y) pairs**regr_sxx(Y, X)**sum(X^2) - sum(X)^2/N ("sum of squares" of the independent variable)**regr_sxy(Y, X)**sum(X*Y) - sum(X) * sum(Y)/N ("sum of products" of independent times dependent variable)**regr_syy(Y, X)**sum(Y^2) - sum(Y)^2/N ("sum of squares" of the dependent variable)

## Applying Functions

To use statistical functions:

- go to
**Indicators** - select
**first Indicator**(Y) you want to use - go to
**Indicators settings** - in
**Members aggregation**select desired statistical functions - from the available drop-down select
**second Indicator**(X)

Overview

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