Hi Elizabeth,

Sorry to be long-winded here, but this is a good question, so I'd
like to provide some details for others who might care...

The -peak option to waver resizes the basis function to the given
peak. Take the gamma variate function, for example. Instead of
applying it directly (with a max value of ~111.801 at 4.7042), it
is rescaled by 111.801 to a maximum of 1.

But this is before convolution (perhaps with a stimulus timing
function). When this is convolved with another function, there
may be multiple copies of this scaled gamma variate function
added together, particularly when stimuli happen close to each
other.

For example, try the following command:

waver -GAM -dt 0.1 -peak 1.0 -numout 60 -inline 10@1

This convolves the gamma variate (at a peak of 1.0) with 10
1's, and then all 0's. Since dt = 0.1 seconds, this represents
10 "on" conditions happening in the total time of 1 second,
putting 10 gamma variates practically on top of each other.

In the output, you can see this maxing out at around 9.84 after
about 5.4 seconds. So the maximum is basically 10 times the
-peak value, since we put 10 copies of the function on top of
each other.

-----------------------

As far as I know, there is no option to waver that will produce
an output file with an input maximum value.

- rick