I understand you have bode plot data in a .csv file which you want to import in MATLAB and from the data you want to obtain the Nyquist plot.
We can read .csv file into a table form using ‘readtable’ command:
More details about the ‘table’ datatype:
To get Nyquist plot, command ‘polarplot’ can be useful:
https://in.mathworks.com/help/matlab/ref/polarplot.html
