i want to plot line grahp of the following data pls help

x=[July'15 Aug'15 Sept'15 Oct'15 Nov'15 Dec'15 Jan'16 Feb'16 Mar'16 April'16 May'16] y=[5.7 7.2 7.8 6.8 7.5 7.8 8.0 7.6 8.8 6.3 6.0]; z=[6.5 7.7 8.5 8.8 9.0 12 12 11.9 10.8 7.1 8.3]; w=[6.5 7.7 8.7 8.2 8.3 10.2 11.5 11.7 9.5 6.5 7.0]; v=[6.2 7.3 8.2 8.2 8.5 9.3 10.9 11.7 10.0 6.6 6.4]; plot (x,y,'r-',x,z,'b-',x,w,'k-',x,v,'m-') xlabel 'TX POWER' ylabel 'Eb/No(dB) Levels' title 'Eb/No Level at Selected Radio Nigeria FM stations accross Nigeria' grid on legend('Suprime FM','Coal City FM','Metro FM','Premier FM')

Answer 1

[Star Strider]

You first have to convert your dates to date numbers (using the datenum function). Then use that as your x-coordinate (independent variable) in your plot, and use the datetick function to format the date numbers as date strings.

This should get you started:

x = {'July 15'; 'Aug 15'; 'Sept 15'; 'Oct 15'; 'Nov 15'; 'Dec 15'; 'Jan 16'; 'Feb 16'; 'Mar 16'; 'April 16'; 'May 16'};
xdn = datenum(x);                                   % Use This For ‘x’
xds = datestr(xdn, 'mmm yy')                        % Check Conversion (Not Necessary For Code)

I had to convert your dates to a cell array of strings. See: Cell Arrays for details. See the documentation for times and dates as well.

I leave the rest to you.