eldo_user

Post-Processing Library
defineVec
defineVec
Defines a PPL object using C-like syntax. Similar to the evalExpr command, defineVec enables
evaluation of an expression written using C-like syntax but the result is stored in a PPL object
named output_object rather than displayed. An error occurs if an object using the same name
already exists in the PPL.
Tip
This command is more likely to be used with wave calculations, whereas the evalExpr
command is for numerical expressions.
Syntax
defineVec expression
Arguments
• output_object
Name of the object which contains the result of the expression.
• expression
Expression to be evaluated.
Examples
Example 1
This function demonstrates the defineVec command. It produces the same results as the
evalExpr function example and returns to Eldo a reference to the PPL object “vector” to plot it.
proc DEFINE_VEC { wv_in } {
# evalExpr using numbers
set a 3
defineVec numerical "2*$a+4"
puts "numerical = [display numerical]"
# evalExpr using waves (use display command to print vector values)
defineVec vector "$wv_in+4"
puts "vector = [display vector]"
return vector
}
A call to this function from the Eldo command:
.call_tcl tran when=END_OF_RUN PLOT=YES LABEL=Absv1 DEFINE_VEC(v(1))
produces the same output as evalExpr but the object vector can be reused in any expression or
returned to Eldo to be dumped in the output file.
1146
Eldo® User's Manual, 15.3