Apply Contrast to Meta-Analysis Results

Note: Uses exact standard errors when covariance is available (return_cov="tri") or for ROI CSV fits with non-robust estimation; otherwise uses a diagonal variance approximation.

Usage

# S3 method for class 'fmri_meta'
contrast(x, contrast, ...)

Arguments

x

An fmri_meta object

contrast

Contrast specification. Can be:

• A numeric vector of contrast weights

• A formula (e.g., ~ groupold - groupyoung)

• A named vector (e.g., c("groupold" = 1, "groupyoung" = -1))

...

Additional arguments

Value

An fmri_meta_contrast object with contrast results