Plot a buffer for signal processing

[PTsou.1]

Hello, I'm doing a project for speech recognition. I have a buffer of 512 values and I want to test every state of the ASR I'm implementing. I am using Keil ARM as IDE and I have tried to use ​the logic analyzer to plot my buffer but I can only plot single variables. An idea is to log the buffer to a file and plot it with Matlab but it's time consuming... Do you have any other ideas?

[Tesla DeLorean]

Use an STM32 board with a screen, and plot/draw on to that?

[PTsou.1]

I don't have a screen..​I tried STM cube monitor as a member wrote on another thread to visualize array, it's quite good but I want to analyze frames, so it's not what I want.