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setting objects from data stored in a file

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I was making a movie for the code I have written in C using gnuplot. I have to set many rectangles in the window at each instant of time (from x1,y1 to x2,y2) and I have this configurations in different files.. config_00.txt, config_10.txt, config_20.txt, etc.. at times 0,10,20, etc.. each of which have 4 columns x1,y1,x2,y2. How can I do this ?. If my file was storing only x and y, and If i need to draw a line only I could have written "plot 'config_10.txt' only.. But here that's not the case.. I need to scan each line of each file and set objects at possitions that line does say.. I saw something like "call" in gnuplot.. but I could't understand please help..  I may write a program to scan each files(which stores configuration at different times) and set objects.. then unset again set from next file but it looks tedious.. for ploting data points in a file with x,y columns we can just say plot "file.txt" u 1:2... but i was asking whether there is something like "from file_10.txt set object rectangle from $1,$2 to $3,$4

After setting those objects, to see the configuration i used to plot something like plot 0.. so gnuplot shows me my configuration

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setting objects from data stored in a file Fahad P <fahadputhalath@gmail.com> - 2018-10-20 00:31 -0700

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