Looks like a parsing problem?

[Justace C. <pro...@co...>]

Hey everybody,

	So, I have just encountered a small problem.  I usually create a
gnuplot script that can just be executed from the command line in Linux.
I do this throught the #! style.  Here is the thing though, I want to
use sprintf.  When I use sprintf in an interactive session it works
fine.  When I put this line in a script I get the following error:

gnuplot> blah = sprintf("Hello")
                        ^
         "./cost", line 54: invalid expression

	I will include the script just below so that we can see if I am missing
anything.  I am running version 4.1 patchlevel 0.  Thanks for any
information.


--------------------Script Below
#!/usr/bin/gnuplot

budget         = 1000

gas_rate       = 2.20
trip_distance  = 1400

auto_insurance = 24.95

car_mpg        = 25
car_cost       = 30 + auto_insurance
car_cap        = 4

van_mpg        = 15
van_cost       = 75 + auto_insurance
van_cap        = 9

hotel_cost     = 75
hotel_cap      = 4

NumberOfVans(x) = ceil(x/van_cap)
NumberOfCars(x) = ceil(x/car_cap)

HotelCost(x) = hotel_cost * (ceil(x/hotel_cap))
VanCost(x)   = NumberOfVans(x)*van_cost +
NumberOfVans(x)*((trip_distance/van_mpg)*gas_rate)
CarCost(x)   = NumberOfCars(x)*car_cost +
NumberOfCars(x)*((trip_distance/car_mpg)*gas_rate)

TripCostVan(x)  = HotelCost(x) + VanCost(x)
TripCostCar(x)  = HotelCost(x) + CarCost(x)

AdditionalCostVanUnbound(x) = (TripCostVan(x)-budget)/x
AdditionalCostCarUnbound(x) = (TripCostCar(x)-budget)/x

AdditionalCostVan(x) = AdditionalCostVanUnbound(x)<0 ? 1/0 :
AdditionalCostVanUnbound(x)
AdditionalCostCar(x) = AdditionalCostCarUnbound(x)<0 ? 1/0 :
AdditionalCostCarUnbound(x)

set title "Cost of the SPS Fermilab Trip"
set xlabel "Person Count"
set ylabel "Cost"

set samples 10000
set xrange [1:30]
set yrange [0:2000]
set y2range [0:100]

set key left
set xtics 1
set ytics auto 
set ytics nomirror
set y2tics auto 
set y2tics nomirror

#blah = gprintf("Gas Rate %2.2f", gas_rate)
blah = sprintf("Hello")

set label blah at .2,.7

plot TripCostVan(x) with lines title "Vans", TripCostCar(x) with lines
title "Cars", \
 AdditionalCostVan(x) with lines axes x1y2 title "Additional Cost
(Van)", \
 AdditionalCostCar(x) with lines axes x1y2 title "Additional Cost
(Car)", \
 budget with lines title ""

pause -1