Plotting a Graph From a Cell Array

I have a cell array, let's call it A, which is a 4 x 4 cell each containing a 10 x 10 numbers from 1 to 5 (the cell array attached):

A = cell(4,4);

Each cell array is like:

I want to plot a graph for each cell (for just one) and all of the cells (for all 16 cell arrays) in separate code that shows how many of the components are 1, 2,3,4 and 5. Essentially a chart similar to (I don't think Matlab can graph such a chart, but something similar):

"A" here is just one of the frame indices (I have to plot multiple cell arrays). Thank you!

Answer 1

[Voss]

First, check out the data:

load('A.mat')
whos

  Name             Size             Bytes  Class    Attributes

  Kappa_x_num      4x4             171264  cell               
  ans              1x30                60  char               

Kappa_x_num{1,1}

ans = 10×10 cell array
    {'4'}    {'4'}    {'1'}    {'3'}    {'1'}    {'1'}    {'1'}    {'1'}    {'5'}    {'5'}
    {'5'}    {'1'}    {'1'}    {'3'}    {'1'}    {'1'}    {'1'}    {'5'}    {'1'}    {'1'}
    {'1'}    {'1'}    {'5'}    {'3'}    {'3'}    {'1'}    {'1'}    {'1'}    {'5'}    {'1'}
    {'5'}    {'5'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'5'}
    {'4'}    {'5'}    {'1'}    {'4'}    {'1'}    {'1'}    {'1'}    {'1'}    {'5'}    {'1'}
    {'5'}    {'1'}    {'5'}    {'3'}    {'1'}    {'1'}    {'3'}    {'1'}    {'5'}    {'1'}
    {'1'}    {'1'}    {'3'}    {'3'}    {'1'}    {'1'}    {'1'}    {'5'}    {'5'}    {'5'}
    {'4'}    {'1'}    {'5'}    {'3'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'5'}
    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'1'}    {'5'}    {'5'}
    {'5'}    {'1'}    {'5'}    {'1'}    {'1'}    {'1'}    {'3'}    {'1'}    {'5'}    {'1'}

Then, do some counting:

[m,n] = size(Kappa_x_num);
max_value = 5;
counts = zeros(m,n,max_value);
for ii = 1:m
    for jj = 1:n
        for kk = 1:max_value
            counts(ii,jj,kk) = nnz(strcmp(Kappa_x_num{ii,jj},num2str(kk)));
        end
    end
end
disp(counts);

(:,:,1) =

    61    74    71    71
   100    71    71   100
   100     6   100   100
   100   100   100   100


(:,:,2) =

     0     0     0     0
     0     0     0     0
     0    37     0     0
     0     0     0     0


(:,:,3) =

    10     1     3     2
     0     1     1     0
     0     0     0     0
     0     0     0     0


(:,:,4) =

     5     0     0     2
     0     0     0     0
     0    56     0     0
     0     0     0     0


(:,:,5) =

    24    25    26    25
     0    28    28     0
     0     1     0     0
     0     0     0     0

Then, make a stacked bar graph (rearranging the counts to do so):

counts = reshape(counts,[m*n max_value]);
disp(counts);

    61     0    10     5    24
   100     0     0     0     0
   100     0     0     0     0
   100     0     0     0     0
    74     0     1     0    25
    71     0     1     0    28
     6    37     0    56     1
   100     0     0     0     0
    71     0     3     0    26
    71     0     1     0    28
   100     0     0     0     0
   100     0     0     0     0
    71     0     2     2    25
   100     0     0     0     0
   100     0     0     0     0
   100     0     0     0     0

figure()
bar(counts,'stacked');
ax = gca();
set(get(ax,'XAxis'), ...
    'TickValues',1:m*n, ...
    'TickLabel',arrayfun(@(x)sprintf('%d',x),1:m*n,'UniformOutput',false), ...
    'TickLabelRotation',0);
set(get(ax,'XLabel'),'String','frame indices');
set(get(ax,'YLabel'),'String','% of points');
legend( ...
    arrayfun(@(x)sprintf('''%d''',x),1:max_value,'UniformOutput',false), ...
    'Location','EastOutside');

[MarshallSc]

Thanks a lot mate!

[MarshallSc]

Sir, how can I compile all of the charts (16) into one bar, so that instead of 16 bars I'd have only one? Basically to see how many points correspond to a value for the 16 cell arrays in one bar. Thank you in advance.

[Voss]

Here's one way. I had to add a second row (of all NaNs) to the input to bar() to get it to do the right thing, and then set the axes XLim afterward. I don't know if there's a better way.

load('A.mat')
[m,n] = size(Kappa_x_num);
max_value = 5;
counts = zeros(1,max_value);
for ii = 1:m
    for jj = 1:n
        for kk = 1:max_value
            counts(kk) = counts(kk) + nnz(strcmp(Kappa_x_num{ii,jj},num2str(kk)));
        end
    end
end
disp(counts);

        1325          37          18          63         157

figure()
bar([counts; NaN(1,max_value)],'stacked');
ax = gca();
set(get(ax,'YLabel'),'String','# of points');
set(ax,'XLim',[0.2 1.8]);
legend( ...
    arrayfun(@(x)sprintf('''%d''',x),1:max_value,'UniformOutput',false), ...
    'Location','EastOutside');

[MarshallSc]

Thank you again so much!

[MarshallSc]

I'm really sorry to ask you another question, the last one; but if I have multiple data files (A,B,C,...), how can I plot them in one graph? I tried to do that myself but I can't get them all in one graph. For example, I've attached 4 data files (1249,1299, 1349, 1399), could you please help me with this final question ,I'd really appreciate it. Sorry again!

[Voss]

Here's one way you can do it. Some of those files contain stuff that's not '1', '2', '3', '4', '5', so the count total is not 6400.

A = load('1249.mat');
B = load('1299.mat');
C = load('1349.mat');
D = load('1399.mat');
Kappa_x_num = cat(3,A.Kappa_x_num,B.Kappa_x_num,C.Kappa_x_num,D.Kappa_x_num);
[m,n,p] = size(Kappa_x_num);
max_value = 5;
counts = zeros(1,max_value);
for ii = 1:m
    for jj = 1:n
        for nn = 1:p
            for kk = 1:max_value
                counts(kk) = counts(kk) + nnz(strcmp(Kappa_x_num{ii,jj,nn},num2str(kk)));
            end
        end
    end
end
disp(counts);

        4931          99         655         103         157

figure()
bar([counts; NaN(1,max_value)],'stacked');
ax = gca();
set(get(ax,'YLabel'),'String','# of points');
set(ax,'XLim',[0.2 1.8]);
legend( ...
    arrayfun(@(x)sprintf('''%d''',x),1:max_value,'UniformOutput',false), ...
    'Location','EastOutside');

[MarshallSc]

Thanks a lot Ben, really appreciate you!