Threshold.RF | R Documentation |
Calculates the Random Field theory threshold to give that results in a specified p-value.
Threshold.RF(p.val, sigma, voxdim = c(1, 1, 1), num.vox,
type = c("Normal", "t"), df = NULL)
p.val |
The required p-value. |
sigma |
The 3D covariance matrix of the random field. |
voxdim |
The dimesnions of a voxel. |
num.vox |
The number of voxels that constitute the random field. |
type |
The type of random field, "Normal" or "t". |
df |
The degrees of the t distributed field. |
Calculates the threshold that produces an expected Euler characteristic equal to the required p-value.
Note: This function is directly copied from "AnalyzeFMRI".
Returns the Random Field threshold.
J. L. Marchini
EC.3D
a <- Threshold.RF(p.val = 0.05, sigma = diag(1, 3), voxdim = c(1, 1, 1), num.vox = 10000)
EC.3D(a, sigma = diag(1, 3), voxdim = c(1, 1, 1), num.vox = 10000)
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