I’m trying to inspect my study datasets for head motion in an expedient manner, using 1dplot with the -volreg option. 3dVolreg states that its output files are configured thus:
The output is in 9 ASCII formatted columns:
n roll pitch yaw dS dL dP rmsold rmsnew where: n = sub-brick index roll = rotation about the I-S axis } pitch = rotation about the R-L axis } degrees CCW yaw = rotation about the A-P axis } dS = displacement in the Superior direction } dL = displacement in the Left direction } mm dP = displacement in the Posterior direction } rmsold = RMS difference between input brick and base brick rmsnew = RMS difference between output brick and base brick
so when I run 1dplot -xlabel -volume-TR -volreg -yaxis -4:4:1:4 -jpg 1dplot-rotation Task3dmotion.1D’[1…3]’ I’m expecting to see three stacked plots of yaw, pitch and roll (with Y axes labeled as such)
so when I run 1dplot -xlabel -volume-TR -volreg -yaxis -4:4:1:4 -jpg 1dplot-displacement Task3dmotion.1D’[4…6]’ I’m expecting to see three stacked plots of dP, dL and dS (with Y axes labeled as such)
However, this second script yields “yaw” “pitch” and “roll” also! Moreover, the same tracing labeled “roll” in the ‘[1…3]’ invocation is now labeled “pitch” in the ‘[4…6]’ invocation.
Finally, when I leave out the column specifiers altogether, the resulting stack of 8 plots has the axis labels shifted, such that the TR (volume number) at bottom is now called “roll” and the top plot of deltaA-P has no label (I uploaded this image).
Something is seriously messed up here.