QSpline

QSpline is a simple implementation of cubic spline interpolation in C.

Setting Up

Download the repository:

git clone https://github.com/gmguarino/QSpline.git

Install gnuplot:

Linux

sudo apt update
sudo apt install gnuplot

Mac OS X

brew install gnuplot --with-x11

Windows

Download from their repo

https://sourceforge.net/projects/gnuplot/files/gnuplot/

Running the Demo

To run the demo simply execute the shell script execute.sh (Linux).

The results are plotted and saved to out.jpeg:

Running step-by-step

Compile the example program interp.c:

gcc -o interp interp.c QSpline.c -lm

Run the executable:

./interp

Plot the results using the .plot script in gnuplot:

gnuplot plotter.plot > out.jpeg

The results will be still stored in out.jpeg.

Remember!

Always clean up after yourself:

rm interp undersampled.dat interpolated.dat