[R] levelplot in lattice

[adschai at optonline.net]

Hi,

I'm new to lattice. So please kindly be patient with me.
I'm trying to arrange groups of levelplots into 3 rows as follows:

Row1: Probabilities as functions of x and y, and conditioned on an event factor vector factor("a","b","c")

Row2: Number of days as functions of  x and y, and conditioned on, again the same event factor("a","b","c")

Row2: Costs as functions of  x and y, and conditioned on, again the same event factor("a","b","c")

I tried the following:

windows();
par(mfrow=c(3,1));
levelplot(z ~ x*y|events, probDat);
levelplot(z ~ x*y|events, daysDat);
levelplot(z ~ x*y|events, costDat);

It does not do what I want. It replace the previous plot every time I call a new levelplot. I can't put them into the same matrix and plot them all at once because the scale of each data type is very different, i.e.g probability=c(0,1), days=c(0,10), etc. I'm wondering if you could suggest a way to solve this problem.

Also, if I would like to put in mathematical notation on the top strip of the plot instead of using text in my events factor vector, what can I do? 

Thank you so much in advance.

- adschai