How to Call Gnuplot from Fortran to Plot Data Points?

[Abraham]

hello. I have a fortran code that has data points as output.

How do I get fortran to plot these data points using gnuplot?

Is there a way to call the external program from within fortran?

I am using fortran95, gfortran compiler. I'm on a windows machine, but
I'm connected remotely to the Unix machines in the lab.

Thanks,

Abraham

 

[rdnck76]

Hi Abraham,

Try using the "system" subroutine.

CALL SYSTEM(gnuplot )

Whatever you put inside the parentheses gets passed to the command line (or terminal depending on your os.)

 

[quicknote]

Hello Abraham,

Thank you for reaching out with your question. It is possible to call Gnuplot from Fortran to plot data points. The first step would be to make sure that you have the necessary libraries and dependencies installed for both Fortran and Gnuplot.

Once that is done, you can use the system command in Fortran to call Gnuplot. This command allows you to execute an external program from within your Fortran code. You will need to provide the necessary commands and arguments to Gnuplot in order to plot your data points.

Here is an example of how you could call Gnuplot from Fortran:

system("gnuplot -persist -e 'plot 'data_points.txt' with points'")

In this example, the system command is used to call Gnuplot and pass in the necessary arguments to plot the data points stored in a text file called "data_points.txt". The -persist option ensures that the plot remains open after the Fortran code has finished executing.

I hope this helps. If you have any further questions or need more guidance, please don't hesitate to reach out.

Best,