While SPM writes out the motion parameters into a text file, sometimes only the files remain (e.g. after pruning the folders). For such cases, the motion parameters can be retrieved from the Analyze files and re-displayed using the showspmrparams function.
This function reads motion parameters from the following files:
The usage is straight forward. Simply change into the folder where the run folders are located and execute the following command:
Next to the figure handle (in this example variable name
f), the function also returns the motion parameters for further plotting or scripting commands such as
max(rpf) - min(rpf) (which would give the peak-to-peak distance, a.k.a. as maximum motion in each of the six degrees of freedom).
The graphical output looks like this: