Real-Time Data Visualization Using Host Computer with Plotting Functions

MATLAB's GUI tools provide a convenient way to build serial communication host computer applications for real-time data reception and graphical display. The following outlines the fundamental implementation approach:

Serial Communication Configuration First, configure serial port parameters such as baud rate, data bits, and stop bits to ensure compatibility with the slave device. MATLAB offers `serial` or `serialport` objects to manage serial connections - for example: `s = serialport('COM3', 9600)` creates a serial object with 9600 baud rate.

GUI Interface Design Use MATLAB's GUIDE tool or App Designer to create user interfaces. The interface can include serial configuration controls (port selection, baud rate selection), start/stop buttons, and axes for real-time plotting. App Designer's drag-and-drop components and callback functions simplify UI development.

Data Reception and Parsing When serial data arrives, MATLAB can read the data stream through callback functions and parse valid information according to predefined protocols (such as fixed-format ASCII or binary data). Implementation typically involves handling data packet segmentation, checksum verification, and format conversion using functions like `readline()` or `read()`.

Real-Time Plot Updates Parsed data can be stored in buffers and updated through timers or direct callbacks. MATLAB's `plot` or `line` functions efficiently refresh graphics dynamically - for continuous updates, use `set(h,'XData',new_x,'YData',new_y)` to modify existing plot properties instead of redrawing entire plots.

Performance Optimization To prevent interface lag, implement incremental plotting that only refreshes new data points. Additionally, appropriately set data buffer sizes using circular buffers or FIFO queues to prevent excessive memory usage. The `drawnow` function forces immediate graphic updates while maintaining responsiveness.

Using these methods, you can build stable and efficient real-time data display host computers suitable for sensor monitoring, device debugging, and similar applications.