Plot several lines on the same plot for the same unique category

Hello,

i have a table which consists of the following data

Category Frequency Modulus

1 5 20

1 2 23

1 8 50

1 1 13

2 5 30

2 2 33

2 8 60

2 1 24

i want to plot Frequency vs. Modulus for each unique category (here i only showed 1 and 2 but i have more than that). also as you can see, my frequency data are not in sequence (they are shuffled 5,2,8,1,...). i want to produce a graph like the shown below (here, each line represents a different category). my frequqncy range is between 1 to 20.

i tried to produce a line for only one category, however what i got is shown in the other graph, i was not able to plot it in a sequential order.

[darova]

Number of points in each category is the same?

[Mohammad Aljarrah]

yes, for each category the number of frequnecies are the same (from 1-20Hz)

Answer 1

[KSSV]

Let T be your data of size m*3.

C = T(:,1) ;    % category 
F = T(:,2) ;    % Frequency 
M = T(:,3) ;    % Modulus 

figure
hold on 
for i = 1:length(unique(C))
    Fi = F(C==i) ;
    Mi = M(C==i) ; 
    [Fi,id] = sort(Fi) ;
    Mi = Mi(id)
    plot(Fi,Mi,'.-')
end

[Mohammad Aljarrah]

thank you very much for your quick response. your code did solve the first problem (separating them into different categories), however my data is still not in sequential order as you can see. can you please help with this? appreciate it :)

[KSSV]

Edited the answer.

[Mohammad Aljarrah]

you are awesome, thank you very much

[darova]

try also

C = T(:,1) ;    % category 
F = T(:,2) ;    % Frequency 
M = T(:,3) ;    % Modulus 
N = 4;          % number of points
FF = reshape(F,N,[]);
MM = reshape(M,N,[]);
plot(FF,MM)