Usage: fdrval [options] dset sub val [val ...]

Reads FDR curve data from the header of dset for sub-brick
#sub and computes the q-value when the sub-brick statistical
threshold is set to val.

 -pval   = also output the p-value (on the same line, after q)
 -ponly  = don't output q-values, just p-values
 -qonly  = don't output p-values, just q-values [the default]

 -qinput = The 'val' inputs are taken to be q-values and then the
  *OR*     outputs are the corresponding statistical thresholds.
 -inverse  This is the inverse of the usual operation.
           * With this option, all 'val' inputs must be between 0 and 1
             (exclusive), or bad things will happen and the program will
             send e-mail to your mother explaining how stupid you are.
           * You cannot use '-ponly' or '-pval' with this option.
           * For example, if you do
               fdrval dset+orig 1 1.2
             and get a q-value of 0.234, then
               fdrval -qinput dset+orig 1 0.234
             should return the value 1.2 -- the original threshold.
             (There may be a small discrepancy, due to the differences)
             (between forward interpolation and inverse interpolation.)
           * To set a (csh) variable to use in a script for thresholding
             via 3dcalc, you could do something like
               set tval = `fdrval -qinput dset+orig 1 0.05`
               3dcalc -expr "step(a-$tval)" -a dset+orig'[1]' -prefix dmask

* Output for each 'val' is written to stdout.
* If the q-value can't be computed, then 1.0 will be output.
* If you input an absurdly high threshold, you will get the smallest
    q-value stored in the dataset header. (This is not necessarily exactly
    the smallest q-value that was computed originally, due to the way the
    FDR curves are calculated and interpolated.)
* If you use '-qinput' and input a q-value that is too small for the
    FDR curve in the dataset header, you will get a threshold at or above
    the largest value in that sub-brick.
* Sample usage:
      fdrval Fred_REML+orig 0 `count -scale 0.1 10 20` | 1dplot -stdin
    Uses the 'count' program to input a sequence of values, and then
    pipes into the 1dplot program to make a graph of F vs. q.
* See the link below for information on how AFNI computes FDR curves:
* Also see the output of '3dFDR -help'

-- A quick hack by RWCox -- 15 Oct 2008 -- PG Wodehouse's birthday!
-- Quick re-hack to add '-qinput' option -- 20 Dec 2011 -- RWCox
-- Re-re-hack to make super-small '-qinput' values work right -- 14 Mar 2014

++ Compile date = Apr  8 2024 {AFNI_24.1.02:linux_ubuntu_16_64}