Blank spaces in shaded plots

[Kilian Hagemann]

John,

> Warning from SQRT:  Data has 88 values < zero
>                     These were set to the undefined value

Somehow your computation involves a square root function, but some of the
input variables/expressions appear to be negative, implying an imaginary
result which grads cannot handle. Carefully check where and how the input
values are negative and correct the problem. Without the critical statements
of your script I cannot give you more advice.

--
Kilian Hagemann

Climate Systems Analysis Group
University of Cape Town
Republic of South Africa
Tel(w): ++27 21 650 2748