--- a/comp/comp_cellcoef2tf.m
+++ b/comp/comp_cellcoef2tf.m
@@ -2,6 +2,9 @@
 %COMP_CELLCOEF2TF Cell to a tf-layout
 %   Usage: coef = comp_cellcoef2tf(coef,dim)
 %
+
+% TO DO: This does not work in octave, because interp1 does not work with
+% TO DO: complex data and always returns double.
 
 
 coefLenMax = max(cellfun(@(cEl)size(cEl,1),coef));