multiple plots on a single graph with legend labelling

Dear friends I am getting multiple plots(as shown in attached fig) with legend labeling for the data as shown in the attachment.There are four data sets as shown in excel/pdf sheet attached where every data set represents one plot.Now i want to draw these plots in matlab.For this purpose when i use the commands then matlab takes the all data sets as a single set.How to import every data set as independent so that i can get 4 independent plots on a single graph???? plz help regards

Answer 1

[KSSV]

data = rand(3,10) ;  % some random data 

figure
hold on
plot(data(1,:),'^-r')
plot(data(2,:),'V-b')
plot(data(3,:),'s-g')

legend('data1','data2','data3')

[muhammad jawad mirza]

Thanks a lot for replying But i still confuse how to group data in four parts from one excel sheet????and what does it mean by "^,V,s"> ???

[Walter Roberson]

In MATLAB, anywhere that accepts a marker shape specification will understand that the following codes for marker shapes:

• ^ - triangle with point upwards
• * - asterisk
• + - plus sign
• o - small circle
• p - pentagon
• s - square
• h - hexagon
• x - cross
• v - triangle with point downwards
• < - triangle with point to the left
• > - triangle with point to the right
• . - dot

Answer 2

[Walter Roberson]

If your spreadsheet is like what you show, with a gap between the data sets, then:

• if I recall correctly, the first output of xlsread() will fill the gap in with nan values, which you can detect and use to split up the data
• if not, then the third output of xlsread() should have empty cells in those locations, which you could detect and use to split up the data.

[muhammad jawad mirza]

Dear sir walter i am not getting your answer plz see my code which all four data sets as one and generate one plot

>> data=xlsread('1'); >> x=data(:,2); >> y=data(:,1); >> semilogy(x,y) if possible then plz correct my code,i am also attaching the output plot of my code