# modalities.fmri.fmristat.invert¶

## Module: modalities.fmri.fmristat.invert¶

nipy.modalities.fmri.fmristat.invert.invertR(delta, IRF, niter=20)

If IRF has 2 components (w0, w1) return an estimate of the inverse of r=w1/w0, as in Liao et al. (2002). Fits a simple arctan model to the ratio w1/w0.