Multiple figures in for loop

Hello,

I would like to run a for loop that produces multiple plots. I looked at other questions that ask this, but they don't seem to fit the data set I have.

This is code I have, if written out (without for loop):

N = length(y1(:,1));
T = (0:N-1)/fs;
figure
subplot(2,3,1)
plot(T,y1(:,1))
subplot(2,3,2)
plot(T,y2(:,1))
subplot(2,3,3)
plot(T,y3(:,1))
subplot(2,3,4)
plot(T,y4(:,1))
subplot(2,3,5)
plot(T,y5(:,1))
subplot(2,3,6)
plot(T,y6(:,1))

This is the code I have so far with the for loop:

figure
for q = 1:length(txtfiles); % This is the number of files I have for my data (in numerical matrices), I have 24 files that I'm interested in, where I'd like to look at 6 files at a time and only the first column
    cnt = 1;
    for bor=1:6:24
        plot(T,y1(:,1))
        cnt=cnt+1;
    end
end

But I get stuck because I can't do this:

figure
for q = 1:length(txtfiles);
    cnt = 1;
    for bor=1:6:24
        plot(T,y(q)(:,1))
        plot(T,y(q+1)(:,1))
        plot(T,y(q+2)(:,1))
        plot(T,y(q+3)(:,1))
        plot(T,y(q+4)(:,1))
        plot(T,y(q+5)(:,1))
        cnt=cnt+1;
    end
end

Thank you for the help in advance!

[Aquatris]

It is not clear what you are trying to achieve. You used subplot in the first codes but not in the ones with for loop. What is the relation between y and y1,y2,y3,y4,y5,and y6? DO you want all the plots in a single plot or 6 subplot?

[Geoff Hayes]

Krithika - in your original code, you seem to have six variables for each of the subplots. If instead of using individual variables but have a cell array or matrix (if the dimensions for each y* are the same) then you can easily iterate over your single array like

 for k=1:6
     subplot(2,3,k);
     plot(T,allData(:,1,k));
  end

where allData is your three-dimensional matrix that has all data from all variables (assuming that dimensions for all y* are the same).

[Krithika A]

Geoff, thank you so much! You helped a lot!

Aquatris, I would like subplots but I was first sorting out the main plots first.

Answer 1

[Star Strider]

I would first concatenate all the (unfortunately numbered) ‘y#’ variables into a single matrix:

y = cat(3, y1,y2,y3,y4,y5,y6);

then address them such that the third dimension is now the previous number, so for example:

plot(T,y(:,1,q))

iterating ‘q’ so that ‘y3(:,1)’ is now ‘y(:,1,3)’ and so for the others.

[Krithika A]

Thank you so much! Your code plus Geoff's comment helped! To anyone reading, this is what my code ended up like (Edit: To note, I put all my data into one matrix for this):

N = length(y(:,1)); % Getting length of my signal
T = (0:N-1)/fs; % Getting the time axis
yname = {'SS1','SS2','SS3','SS4','SS5','SS6'}; %Subplot titles
ytitle = {'V1','V2','V3','V4'}; % Main plot title

for i2=1:4 % Plotting multiple plots with subplots
    figure
    for i = 1:6
        This_i = (i+((i2-1)*6)); % I have 24 columns in y, where I would like to plot six of them at a time. Thus, 4 plots with 6 subplots each
        subplot(2,3,i);
        plot(Tt,y(:,This_i));
        title([ytitle{i2},' - ',yname{i}]);
    end
end

[Star Strider]

My (our) pleasure!