pie chart creation with name (number) and corresponding percentage

Hi! I would like to create a pie chart like in the present demo:

x = [1,2,3];
p = pie(x);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 
txt = {'Item A: ';'Item B: ';'Item C: '};

combinedtxt = strcat(txt,percentValues); 

pText(1).String = combinedtxt(1);
pText(2).String = combinedtxt(2);
pText(3).String = combinedtxt(3);

How can I achieve the same result with my data?

I tried it this way:

number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

number2 = {};
for K = 1:height(number)
    number1 = sprintf('%.0f',number(K));
    number2 = [number2,{number1}];
end
number2 = number2.';


p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

combinedtxt = strcat(number2,percentValues); 

for K = 1:height(value)
    pText(K).String = combinedtxt(K);
end

Answer 1

[Star Strider]

One approach —

number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];

nrc = compose('%d ', number(~idx)).';
nrc{end+1} = [num2str(combine) ' '];
cattxt = cellfun(@(x,y)cat(2,x,y),nrc,  percentVals, 'Unif',0);

pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pText(k).String = cattxt(k);
end

.

[Alberto Acri]

Thank you for your reply @Star Strider. Do you also know how to make the following change?

Also, is it possible to determine the color for each piece?

For example, use:

color = [1 0 0; 0 1 0; 0 0 1; ....];

[Star Strider]

As always, my pleasure!

That simply requires a few modifications of my current code (and a reference to the pie documentation section on Compare Two Pie Charts to add the legend).

Try this —

number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];

nrc = compose('%d ', number(~idx)).';
nrc{end+1} = [num2str(combine) ' '];
cattxt = cellfun(@(x,y)cat(2,x,y),nrc,  percentVals, 'Unif',0);     % Originally Segment Labels, Now 'legend' Text

pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
legend(cattxt, 'Location','eastoutside')

.

[Alberto Acri]

Hi @Star Strider. Perfect!

I also wanted to ask you for two other separate pieces of information:

1. I would like to change the legend of the chart created like this:

2. I asked a new question in this post. It is a continuation to this discussion.

[Star Strider]

Thank you!

That requires replacing this assignment:

nrc{end+1} = [num2str(combine) ' ']

with this one:

nrc{end+1} = sprintf('%d %d\n%d %d ',combine); % NEW 'nrc{end+1}'

or this one:

nrc{end+1} = sprintf('%d %d (%2d%%)\n%d %d',[combine(1:2) sum(pcts(idx)) combine(3:4)]) % NEW 'nrc{end+1}'

To get different versions, change the format specifier string.

I changed the others as well, since with a new compose call and with sprintf for the last element in ‘nrc’, ‘cattxt’ is no longer necessary. To avoid re-writing the rest of the code, I just set:

cattxt = nrc;

Try this —

number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];
nrc = compose('%d (%2d%%)', [number(~idx).', pcts(~idx)]);
% return

% nrc{end+1} = [num2str(combine) ' ']
nrc{end+1} = sprintf('%d %d (%2d%%)\n%d %d',[combine(1:2) sum(pcts(idx)) combine(3:4)]);    % NEW 'nrc{end+1}'
% cattxt = cellfun(@(x,y)cat(2,x,y),nrc,  percentVals, 'Unif',0);     % Originally Segment Labels, Now 'legend' Text
cattxt = nrc;
pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
legend(cattxt, 'Location','eastoutside')

.

[Alberto Acri]

Thank you! While regarding the position of the numbers 78 79 87 88, is it possible for me to decide how to arrange them? I would like to decide how to arrange them, like 1x4, 2x2, 3x1, 4x1. (see central legend: arranged 3x1)

I tried editing this line of code but it doesn't seem to be the right move.

nrc{end+1} = sprintf('%d %d (%2d%%)\n%d %d',[combine(1:2) sum(pcts(idx)) combine(3:4)]);

Also, is it possible to align the numbers with the colored box (as for the other cases)? (see last legend)

[Star Strider]

As always, my pleasure!

The last legend entry is controlled by this line:

nrc{end+1} = sprintf('%d %d (%2d%%)\n%d %d',[combine(1:2) sum(pcts(idx)) combine(3:4)]); % NEW 'nrc{end+1}'

so you can change the format descriptor string to an extent, for example:

nrc{end+1} = sprintf('%d %d %d (%2d%%)\n%d %d',[combine(1:3) sum(pcts(idx)) combine(4)]); % NEW 'nrc{end+1}'

however the placement with respect to the associated coloured patch bar is likely not an option. It has to be like one of the first two images. (My source for such information is Undocumented MATLAB and it has no information on this.) Adding an ‘invisible’ patch like that to the legend may not be possible without also adding it to the pie chart. The legend function has an undocumented second output that allows for some slight changes, however not what you want to do (I did that experiment, and it failed).

It is possible to get them to line up like you want by changing the edit descriptor string in ‘nrc{end+1}’, (adding a leading '\n') however that leaves a gap above the last patch —

number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];
nrc = compose('%d (%2d%%)', [number(~idx).', pcts(~idx)]);
% return

% nrc{end+1} = [num2str(combine) ' ']
nrc{end+1} = sprintf('\n%d %d (%2d%%)\n%d %d',[combine(1:2) sum(pcts(idx)) combine(3:4)]);    % NEW 'nrc{end+1}'
% cattxt = cellfun(@(x,y)cat(2,x,y),nrc,  percentVals, 'Unif',0);     % Originally Segment Labels, Now 'legend' Text
cattxt = nrc;
pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
legend(cattxt, 'Location','eastoutside')

.

[Alberto Acri]

Thanks again for the answer @Star Strider! You have been a great help!

So it is not possible to get the provisions in the following way? That is, by modifying R and C.

Only for values ​​with <7%!

[Star Strider]

As always, my pleasure!

You just need to change the format descriptor in the sprintf call in ‘nrc{end+1}’ in various ways —

number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];
nrc = compose('%d (%2d%%)', [number(~idx).', pcts(~idx)]);
% return

% nrc{end+1} = [num2str(combine) ' ']
nrc{end+1} = sprintf('\n%d %d %d (%2d%%)\n%d',[combine(1:2) sum(pcts(idx)) combine(3:4)]);    % NEW 'nrc{end+1}'
% cattxt = cellfun(@(x,y)cat(2,x,y),nrc,  percentVals, 'Unif',0);     % Originally Segment Labels, Now 'legend' Text
cattxt = nrc;
pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
legend(cattxt, 'Location','eastoutside')

% Previous 'nrc{end+1}' is now 'nrc{end}' In This Illustration — 
nrc{end} = sprintf('\n\n\n%d (%2d%%)\n%d\n%d\n%d',[combine(1) sum(pcts(idx)) combine(2:4)]);    % NEW 'nrc{end+1}'
cattxt = nrc;

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
legend(cattxt, 'Location','eastoutside')

% Previous 'nrc{end+1}' is now 'nrc{end}' In This Illustration — 
nrc{end} = sprintf('%d %d %d %d (%2d%%)',[combine sum(pcts(idx))]);    % NEW 'nrc{end+1}'
cattxt = nrc;

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
legend(cattxt, 'Location','eastoutside')

That is as close as I can get the last element to what you want. I cannot do anything about the extra spaces.

.

[Alberto Acri]

OK, the result is good enough for me!

One last info: with a different dataset I have a problem regarding the display of <7% values in the legend.

I tried using the line of code you showed me earlier but I get a layout that is not correct. I'll leave you the code I used:

number = [48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88];
value = [0	0	0	0	0	0	42	91	152	276	440	572	821	1155	1580	1761	2157	2256	2578	2499	2715	2794	3280	3237	3263	3586	3334	3652	3675	4404	4509	5239	6400	9074	11047	13147	15137	13909	6354	1152	183];

f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];
nrc = compose('%d (%2d%%)', [number(~idx).', pcts(~idx)]);

% VARIED
nrc{end+1} = sprintf('%d %d %d %d %d (%2d%%)\n%d %d %d %d %d',[combine(1:5) sum(pcts(idx)) combine(6:end)]);    % NEW 'nrc{end+1}'

cattxt = nrc;
pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
lgd = legend(cattxt, 'Location','eastoutside','FontSize',12);

I really wanted to get this:

Is this something workable?

Also, I noted that the total comes 107% (7+8+10+11+10+61).

[Star Strider]

Thank you!

You need to change ‘nrc{end+1}’ to accommodate the new ‘combine’ vector:

nrc{end+1} = sprintf('%d %d %d %d %d %d (%2d%%)\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d',[combine(1:6) sum(pcts(idx)) combine(7:end)]); % NEW 'nrc{end+1}'

Here, I used a (6x6) array for the numbers, since ‘combine’ is now a (1x36) vector. Change it to do whatever works best for you.

Try this —

number = [48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88];
value = [0	0	0	0	0	0	42	91	152	276	440	572	821	1155	1580	1761	2157	2256	2578	2499	2715	2794	3280	3237	3263	3586	3334	3652	3675	4404	4509	5239	6400	9074	11047	13147	15137	13909	6354	1152	183];
f = figure;
p = pie(value);

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];
nrc = compose('%d (%2d%%)', [number(~idx).', pcts(~idx)]);

% VARIED
nrc{end+1} = sprintf('%d %d %d %d %d %d (%2d%%)\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d',[combine(1:6) sum(pcts(idx)) combine(7:end)]);    % NEW 'nrc{end+1}'

cattxt = nrc;
pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
lgd = legend(cattxt, 'Location','eastoutside','FontSize',12);

.

[Alberto Acri]

Thanks again! But why the sum of the % is 107 and not 100?

It should be:

81 (7%)

82 (8%)

83 (10%)

84 (11%)

85 (10%)

-------------

(46%)

48 49 ...... (54% and not 61%)

....... 86 87 88

[Star Strider]

That is probably due to accumulated rounding error.

[Alberto Acri]

How can I fix it?

[Star Strider]

That may not be possible. I tried my own version, and I don’t get exactly the same results the pie gets, although my calculations otherwise work —

number = [48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88];
value = [0	0	0	0	0	0	42	91	152	276	440	572	821	1155	1580	1761	2157	2256	2578	2499	2715	2794	3280	3237	3263	3586	3334	3652	3675	4404	4509	5239	6400	9074	11047	13147	15137	13909	6354	1152	183];
f = figure;
p = pie(value);

[U_value,nidx,ix]  = unique(value,'stable');
Counts = accumarray(ix, value);
sum_Counts = sum(Counts);
Freqs = Counts/sum(Counts) * 100;

[v1,v2] = bounds(Freqs)

v1 = 0

v2 = 11.0917

number_v = number(nidx).';
Interim_Results = table(number_v,Counts,Freqs)

Interim_Results = 36×3 table
    number_v    Counts     Freqs  
    ________    ______    ________

       48           0            0
       54          42     0.030776
       55          91     0.066681
       56         152      0.11138
       57         276      0.20224
       58         440      0.32241
       59         572      0.41914
       60         821      0.60159
       61        1155      0.84633
       62        1580       1.1578
       63        1761       1.2904
       64        2157       1.5806
       65        2256       1.6531
       66        2578        1.889
       67        2499       1.8312
       68        2715       1.9894

Freqs_lt_7 = Freqs < 7;                                             % Threshold Results

Thresholded_Interim_Results_1 = sum(Freqs(Freqs_lt_7))

Thresholded_Interim_Results_1 = 60.9880

Thresholded_Interim_Results_2 = [number_v(~Freqs_lt_7)  Freqs(~Freqs_lt_7)  round(Freqs(~Freqs_lt_7))];
Thresholded_Interim_Results_2(end+1,:) = [NaN sum(Thresholded_Interim_Results_2(:,2:end))]

Thresholded_Interim_Results_2 = 5×3

82.0000 8.0948 8.0000 83.0000 9.6335 10.0000 84.0000 11.0917 11.0000 85.0000 10.1919 10.0000 NaN 39.0120 39.0000

pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

delete(f)

pcts = regexp(percentValues, '\d*', 'match');
pcts = cellfun(@(x)str2double(x), pcts);
idx = pcts<7;
combine = number(idx);
pctv = pcts(idx);
percentVals = compose(' (%d%%)',pcts(~idx));
percentVals{end+1} = [' (' num2str(sum(pctv)) '%)'];
nrc = compose('%d (%2d%%)', [number(~idx).', pcts(~idx)]);

% VARIED
nrc{end+1} = sprintf('%d %d %d %d %d %d (%2d%%)\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d',[combine(1:6) sum(pcts(idx)) combine(7:end)]);    % NEW 'nrc{end+1}'

cattxt = nrc;
pText(numel(cattxt)+1:end) = [];

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
lgd = legend(cattxt, 'Location','eastoutside','FontSize',12);

.

[Voss]

@Alberto Acri: The numbers sum to 107 because the first (deleted) pie chart includes several strings that are "<1%". When you get the number from those strings and use it, of course those are counted as 1 instead of what they really are. The solution is, instead of getting the percentages from a pie chart you're going to delete, just calculate the percentages directly, and they'll have a higher precision. You'll have to round them when you use them in the legend, but here's the important part: the small ones (<1%) do not get "rounded" to 1 and then summed; instead you sum them first and then round the result. You can see below that the total sum is 100:

number = [48	49	50	51	52	53	54	55	56	57	58	59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88];
value = [0	0	0	0	0	0	42	91	152	276	440	572	821	1155	1580	1761	2157	2256	2578	2499	2715	2794	3280	3237	3263	3586	3334	3652	3675	4404	4509	5239	6400	9074	11047	13147	15137	13909	6354	1152	183];

% calculate percentages:
pcts = 100*value.'/sum(value);

idx = round(pcts)<7;
combine = number(idx);
pctv = pcts(idx);
nrc = compose('%d (%2d%%)', [number(~idx).', round(pcts(~idx))]);

% VARIED
nrc{end+1} = sprintf('%d %d %d %d %d %d (%2d%%)\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d\n%d %d %d %d %d %d',[combine(1:6) round(sum(pcts(idx))) combine(7:end)]);    % NEW 'nrc{end+1}'

cattxt = nrc;

value2 = [value(~idx) sum(value(idx))];

figure
p = pie(value2);
pPatch = findobj(p, 'Type','Patch');
cm = colormap(turbo(numel(pPatch)));                                % Colour Array (Can Be Whatever You Define It To Be)
pText = findobj(p,'Type','text');
percentValues = get(pText,'String');

for k = 1:numel(cattxt)
    pPatch(k).FaceColor  = cm(k,:);                                 % Colour Each Patch Individually
    pText(k).String = [];                                           % Delete The 'String' Labels
end
lgd = legend(cattxt, 'Location','eastoutside','FontSize',12);

Answer 2

[Benjamin Kraus]

It is worth checking out the new (as of R2023b) piechart command.

You can read about it here: https://blogs.mathworks.com/graphics-and-apps/2023/11/13/pie-charts-and-donut-charts/

A new feature (added in R2024a) is the LabelStyle property, which can be used to quickly create the labels you were asking about.

x = [1,2,3];
txt = {'Item A';'Item B';'Item C'};
p = piechart(x, txt);
p.LabelStyle = 'namepercent';

Answer 3

[MYBLOG]

The code you provided is mostly correct, but you can simplify it a bit. Here's how you can achieve the same result with your data:

% Your data
number = [78;79;80;81;82;83;84;85;86;87;88]';
value = [4509;5239;6400;9074;11047;13147;15137;13909;6354;1152;183]';

% Create labels for the pie chart
number2 = cellstr(num2str(number)); % Convert numbers to cell array of strings

% Create the pie chart
p = pie(value);
pText = findobj(p,'Type','text');
percentValues = get(pText,'String'); 

% Combine labels and percentages
combinedtxt = strcat(number2, ': ', percentValues);

% Set the combined text for each slice
for K = 1:numel(value)
    pText(K).String = combinedtxt{K};
end