plot based on Table

I have a table like this

id nodeName longitude Latitude

'0' 'Sydney1' '151.20732' '-33.86785'

'1' 'Brisbane2' '153.02809' '-27.46794'

'2' 'Canberra1' '149.12807' '-35.28346'

that contain id of Nodes, Nod names and geographical longitudes and Latitudes.

now i want to have graph that be ecording to longitude and Latitude and also show the nod names as label of Nodes in plot. but i cant.

[Cris LaPierre]

Why not? What error message are you getting? Share the code you are using.

[M Abedi]

NodeCell2=cell(NodNumber, 4);
    for i=1:NodNumber
        
      NodeCell2(i,1)=all_ids(i); %id
      NodeCell2(i,2)=all_names(i); %name
      NodeCell2(i,3)=all_longs(i); % longitude           
      NodeCell2(i,4)=all_lats(i); %latitude
     
    end
    
    figure(3);
    %plot(lats,longs,nodes);
    plot(NodeCell2(:,2),NodeCell2(:,3), NodeCell2(:,2));
    

i use this comands . NodeCell2 is my cell matrix. but i cant show it in graph. this code has such error:

Error using plot
Invalid first data argument

Error in mytest7 (line 185)
plot(NodeCell2(:,2),NodeCell2(:,3), NodeCell2(:,2));

i am new in using Matlab and i dont know it well.

[Walter Roberson]

NodeCell2 = cell{1,4};
NodeCell2{1} = str2double(all_ids);
NodeCell2{2} = categorical(all_names);
NodeCell2{3} = str2double(all_longs);
NodeCell2{4} = str2double(all_lats);

scatter(NodeCell2{3}, NodeCell2{4});
text(NodeCell2{3}, NodeCell2{4}, NodeCell2{1});  %you might need string(NodeCell2{1}))

Answer 1

[Cris LaPierre]

My first suggestion is to not convert your data to a cell. If you want to store everything in a single variable, use a table.

all_ids={'0';'1';'2'};
all_names={'Sydney1';'Brisbane2';'Canberra1'};
all_longs={'151.20732';'153.02809';'149.12807'};
all_lats={'-33.86785';'-27.46794';'-35.28346'};

myTbl = table(str2double(all_ids),string(all_names),str2double(all_longs),str2double(all_lats),'VariableNames',["id","nodeName","Longitude","Latitude"])

myTbl = 3x4 table
    id     nodeName      Longitude    Latitude
    __    ___________    _________    ________

    0     "Sydney1"       151.21      -33.868 
    1     "Brisbane2"     153.03      -27.468 
    2     "Canberra1"     149.13      -35.283 

You can't include text in your plot command. Use the text function. See this page for how to access data in a table.

plot(myTbl.Latitude,myTbl.Longitude,'^');
text(myTbl.Latitude,myTbl.Longitude,"\leftarrow " + myTbl.nodeName)

[M Abedi]

thanx alot