Plot data from data file with unknown number of columns

Hi to every one. I am a novice to MATLAB. I am trying to plot figures from a data file. The data file is generated using a software. The number of columns is not fixed and can be changed according to requirement. I want to build a script which can read the file and then plot it. Another thing is that I want to put header line as the legends of the plot. I am attaching the data file as well as the plot. Your kind help would be highly appreciated.***

       Time          Pop1            Pop2
     1.0000000E-08   4.097568E-006   2.211371E-005
     2.0000000E-08   3.511726E-006   1.775795E-005
     3.0000000E-08   2.828558E-006   1.429533E-005
     4.0000000E-08   2.265553E-006   1.154281E-005
     5.0000000E-08   1.816197E-006   9.354735E-006
     6.0000000E-08   1.458834E-006   7.615319E-006
     7.0000000E-08   1.174745E-006   6.232541E-006
     8.0000000E-08   9.489138E-007   5.133246E-006
     9.0000000E-08   7.693916E-007   4.259290E-006
     1.0000000E-07   6.266799E-007   3.564453E-006

    Currently, I am using this script, but it is not generating legend with the plot.

    clear all;
    close all;
    clc
    A=dlmread('levelspp.dat','', 1, 0);
    x=A(:,1);
    B=dlmread('levelspd.dat','', 1, 0);
    x1=B(:,1);
    figure(2)
    plot(x,A(:,2:end))
    xlabel('Time (s)')
    ylabel('Population')
    figure(3)
    plot(x1,B(:,2:end))
    xlabel('Time (s)')
    ylabel('Population')

[madhan ravi]

upload your data file

[prashant sharma]

Please find the attached files. Please change the file extension to .dat I am unable to upload .dat files. Thanks.

Answer 1

[KSSV]

YOu need not to know how many columns are present. You can use importdata to load the data.....and you can plot.

A = importdata('data.txt') ;
data = A.data ;
t = data(:,1) ;  % time 
y = data(:,2:end) ;

plot(t,y)
l = legend ;
l.String = strrep(l.String,'data','Pop')

If you want the number of columns. Use size. size(data) should give you the number of columns.

[prashant sharma]

Thanks for the answer. I am still unable to plot the figures with the legends as shown in the attached file.

I am running this script.

Aaa = importdata('levelspd.dat', ' ', 1);
x=Aaa.data(:,1);
plot(x,Aaa.data(:,2:end))
legend

[KSSV]

Edited the coded to update legend.

[prashant sharma]

Thanks for your kind help.

[KSSV]

Thanks is accepting and voting the answer.