Subplot ID in a loop where k> number of plot locations for a single page

Hi, This is a tricky one for me to explain. I have q files, and want to subplot them on a page with 4 locations. Due to considerations for how the figures/pages will be looked at in a pdf I am using a (2,4,q) subplot and plotting a distribution in (2,2,1:2) etc. It would be easier to just have (2,2,q) but they would not look so good in the final pdf.

For q being no higher than 4 I use

subplot(PlotsPerPage/2,PlotsPerPage,[q+q-1, q+q])

which works nicely. But when q>4 it falls over. I think my problem is more of a math issue than matlab but I am hoping that there will be a way to do take use of a matlab function maybe in a way I am not aware of. I can do this longhand by having if statements for when q=5:8 or q=9:12 etc but would like to avoid that as I can see q going to a very high number by the end of the year.

[Jan]

I'm confused by the question. What does "using a (2,4,q) subplot and plotting a distribution in (2,2,1:2) etc." mean? Do you really mean "subplot(PlotsPerPage/2,PlotsPerPage, [q+q-1, q+q])"? Then the pages contains more plots then PlotsPerPage and for q = 2 you get the position [3, 4]. Sorry, I cannot follow you.

You currently have:

subplot(2,4,q)

What fails for q > 4? Do you want to display 8 diagrams per page? What happens and what do you want to happen?

[Stephen Devlin]

Hi Jan, I only want to display 4 diagrams per page. Each diagram will fill two subplot locations on a page, so when q=1 it would fill subplot locations 1&2, q=2 it would fill subplot locations 3&4, q=3 it would fill subplot locations 5&6, q=4 it would fill subplot locations 7&8.

Using [q+q-1, q+q] when q=1 q+q-1=1 and q+q=2 giving the subplot location [1 2] for when q=1. This gives a stretched out subplot that looks better in my pdf report.

Where it 'falls over' is when say q=7, and I cannot figure out the maths then for the loop that will work for the q values for both 1:4 and >4.

Answer 1

[Jan]

Do you mean:

q  = 1:10
qq = mod(q - 1, 4) + 1
>>  1     2     3     4     1     2     3     4     1     2

Then the values of qq are restricted to 1:4. I assume you have to open a new figure when qq is 1 - as shown in your other thread.

[Stephen Devlin]

Hi Jan,

It looks like it's what I mean yes, I will have a go with this and get back to you. very much appreciated.

Steve

[Stephen Devlin]

Hi Jan, Something odd happens with my code and I am not sure why, the first loop was dealing with the case where q (which is the number of Volume columns (nVolCol)) q=1:4. That displays a figure with 4 subplots the way i want.

With the second loop I only seem to see the last subplot plotted, and in the wrong place.

   figure('units','normalized','outerposition',[0 0 1 1]);

     PlotsPerPage = 4  
    for q = 1:PlotsPerPage

new_str=strrep(files(q).name, '_', ' ');
new_str2=strrep(new_str, '.xlsx', ' ');
new_str3=strrep(new_str2, 'RA 20.5V 2US', ' ');

      %subplot(2,2,n)
   subplot(PlotsPerPage/2,PlotsPerPage,[q+q-1, q+q])
  counts = hist(loopDataVol(:,q),centers);
  bar(counts / sum(counts));
  set(gca,'FontSize',10,'FontWeight','Bold')
      set(0,'DefaultAxesLineStyleOrder',{'-','--',':'}) %or whatever order you want
  %    title('Velocity Distribution Row1')
     title([' XXXXXXXX VolDist ',new_str3]);

    end

    if nVolCol>4
      figure('units','normalized','outerposition',[0 0 1 1]);   

     for   q=5:8
        new_str=strrep(files(q).name, '_', ' ');
        new_str2=strrep(new_str, '.xlsx', ' ');
        new_str3=strrep(new_str2, 'RA 20.5V 2US', ' ');

      %subplot(2,2,n)
       subplot(2,4,[mod(q - 1, 4) + 1, mod(q - 1, 4) + 2])
       counts = hist(loopDataVol(:,q),centers);
       bar(counts / sum(counts));
       set(gca,'FontSize',10,'FontWeight','Bold')
        set(0,'DefaultAxesLineStyleOrder',{'-','--',':'}) %or whatever order you want
  %    title('Velocity Distribution Row1')
        title([' YYYYYYYYY VolDist ',new_str3]);

     end  

    end

[Jan]

If "subplot(PlotsPerPage/2,PlotsPerPage,[q+q-1, q+q])" works reliably, then use in the 2nd loop:

for q = 5:8
  qq = mod(q - 1, 4) + 1;
  subplot(PlotsPerPage/2,PlotsPerPage,[qq+qq-1, qq+qq])