QDECR
Guide: 10 pages

Guide

Tutorials

From a first analysis to the statistics behind it. The tutorials build on each other, but each stands on its own too.

  1. Quick start

    A complete analysis of cortical thickness against age and sex, from the data frame to the plot.

  2. Formulas and design

    How QDECR reads a model formula: the vertex measure, covariates, factors, interactions and weights.

  3. Imputed data

    Running QDECR on multiply imputed data, which inputs it accepts, and how the results are pooled.

  4. Inspecting results

    Reading a QDECR result with print, summary and hist, and what stacks are.

  5. Plotting

    Snapshots of the significant clusters with qdecr_snap, and results opened in Freeview.

  6. Saving, loading and MGH files

    Saving and loading results, freeing memory, and reading and writing MGH files.

  7. Performance and memory

    Making an analysis faster and lighter: cores, BLAS, shared memory and chunk size.

  8. Understanding the statistics

    What QDECR computes at each vertex, and how it corrects for multiple testing across the surface.

  9. Troubleshooting and FAQ

    Fixes for common problems, answers to frequent questions, and the known limitations.