# Continuous data

Continuous data do not fall into discrete categories. Instead they produce a continuous distribution. Some of these distributions can be modeled algebraically. The two most common ones are *Poisson* and *Gaussian* (or normal).

A perfect normal distribution (top) as compared to a histogram of yield data from a QTL experiment (bottom). Data points fall into a continuous range, not discrete classes.

Identifying correlations for this type of data requires more complex calculations such as regressions.

Top image from http://mathworld.wolfram.com/PoissonDistribution.html, lower image from T. Fulton using QGene software (http://www.qgene.org).