DavidHenriques wrote:You have a lot of learning to do and the FFT is the least of your worries. Check out Java implementations of the FFT from the source forge repository. Take a look at my second post in Perform Hamming window and FFT with Java for an outline of what you have to do to create the spectrum values. Take a look at JFreeChart for the display of the results though you might find it a bit slow when running real time (I use my own very very simple but fast charting).
Ok i see. But how to create the graphics, exist some kind of free library related with this?
DavidHenriques wrote:Sorry but that is a dumb question. Did you follow the installation instructions and did you add the jars to your project in the correct manner? Since I do not know what development environment you are using and what steps you followed to add JFreeChart to your project how the heck do I know if it is 'correct'? Where possible I will assist with the general design and implementation of your project but I will not hand hold you through the minutia of Java or the minutia of your development environment.
Thanks for the tips sabre150. I have to much work in the future :)
I downloaded the JFreeChart and add to the library from my project, correct this? Sorry this dumb question
DavidHenriques wrote:You don't need to use JFreeChart to understand how to use the FFT. You don't need a GUI to understand or compute spectral density estimates . You need to spend some time studying the basics of signal analysis in relation to spectral estimation.
I added the jar to my project. I am developing this project on netbeans, i am developing my GUI using swing components.
I need to study more the FFT and how to implement this before.