Gnuplot C++ plotting in real time from txt files -


hi plotting data file through pipe in c++. have written function reads in text file, processes information, plots data in text file , plots labels , arrows needed.

now need way plot smoothly in loop, different text file read , plotted every iteration without gnuplot window flickering.

for example:

for (unsigned int = 0; i< 10; i++){     processing_plotting(i, gp); }

this code have in main program plot text file indicated 'i'. eg: laserdata1, laserdata2 etc..

currently plot flickers , unreadable due speed called. have looked way plot data in real time gnuplot haven't had luck, appreciated. thanks

a picture of sort of thing plotting: http://imgur.com/3etpmab

there example of animation comes gnuplot-iostream library. doesn't flicker, @ least not on machine (linux). disclaimer: i'm author of library, shameless plug.

your code snippet doesn't show how interface gnuplot, there 3 things must sure do: 1) don't close , reopen pipe after each frame, 2) call fflush on pipe after every frame, , 3) add delay between frames. delay on linux call ::usleep(microseconds) (and include unistd.h), on windows call ::sleep(milliseconds) , include windows.h.

the thing piping animation data gnuplot don't know if keeping up. flush , sleep vital. have built oscilloscope out of gnuplot know can work well.


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