Hi afni group:
I wander if there is one way to threshold a statistical dataset by setting the q/p value, instead of using t/F value, by 3dclust/3dmerge, or you have other recommendation.
The reason I am looking for this method is that for different contrast, the statistical threshold could change with the same q value.
Well, you can use 3dClusterize to threshold more easily than with 3dmerge/3dclust, probably:
There, you can use either voxelwise p or statistic value, along with cluster volume. For a code example using it on an actual dataset with 3dClustSim and , you can see here:
I haven’t looked at using this specifically with 3dFDR output or whatever you are using, but it should be an easier place to start than 3dclust/3dmerge.
your reply is super helpful, while I still wander, if there is one way to threshold by specifying the q FDR value?
Hmm, I’m not certain, but I think you can use “fdrval -qinput …” to get the corresponding statistic threshold out of a specific brick when you provide a qvalue of interest?
Perfect, that will do by assigning the std to a variable and use it in 3dclust!!!
You work at weekends! Take a rest! although I am sooooo happy to have your reply without waiting for Monday.
I had a bit of spare time between World Cup matches…