Ratio of two contrasts, i.e. `sum(contrast1*beta)/sum(contrast2*beta)`

.

effect_contrast_ratio(contrast1, contrast2)

## Arguments

contrast1 |
First contrast weights, a vector with the same length as the number of columns in the design matrix. |

contrast2 |
Second contrast weights, a vector with the same length as the number of columns in the design matrix.
`sum(contrast2*beta)` should always produce a positive value. |

## Value

An object defining how to calculate an effect size.