The Arduino support package has built in functions for the HC SR04 ultrasonic sensors. You can find the information here: https://www.mathworks.com/help/supportpkg/arduinoio/ultrasonic-sensor.html?s_tid=CRUX_lftnav
Creating a RADAR screen is a very general question. Show us what you have done so far or an example of what you would like and we can then help you. A good place for getting started is the MATLAB File Exchange: https://www.mathworks.com/matlabcentral/fileexchange?q=radar
