Calculating the spherical spline interpolation of the
loaded signals to fill the areas between the sensor positions on the
head model with interpolated valuesdepends on the
currently definied intervals. Therefore intervals must be defined
before activating the mapper (see the general intervals
page).
Only the slider setting the currently
displayed interval/time point remains active and can be used to
"scroll" through the active signal (please note that on windows, this
is considerably slower than on unix type operating system, because the
linear algebra library is currently not well optimized for windows).