Assign multiple custom labels in one plot using a for loop

stats=[3.0000   26.7150   43.0300   53.6300; 
    4.0000   17.5450   33.4050   80.7700; 
    5.0000   32.3300   39.6800  109.7800; 
    15.0000  179.5300  179.5300  179.5300;
   16.0000   21.5550   96.1550  156.43003]; % the row size of this matrix changes depending on previous calculations
facnrs=stats(:,1);
P10=stats(:,2);
P50=stats(:,3);
P90=stats(:,4);
neg=P50-P10;
pos=P90-P50;
% plot the results
errorbar(stats(:,1),P50,neg,pos,'o')
xsmin=min(stats(:,1))-1;
xsmax=max(stats(:,1))+1;
set(gca,'xlim',[xsmin xsmax])
set(gca,'ydir','reverse');
xlabel('Facies')
ylabel('Depth (m) from top for P10, P50 & P90')
ylh = get(gca,'ylabel');
ylp = get(ylh, 'Position');
set(ylh, 'Rotation',270, 'Position',ylp, 'VerticalAlignment','middle', 'HorizontalAlignment','center')
% label the number of occurrences for each facies on top of errorbars;
% start with counting the nr of occurrences per facies
for i=1:length(facnrs)
    x=find(facies==facnrs(i));
    noccur(i)=length(x);
end
noccur=noccur';
% compile string for number of occurrences
bartext=compose('n = %d',noccur);
for m=1:length(facnrs)
    textXpos(m)=facnrs(m)-1;
end
textXpos=textXpos';
for j=1:length(facnrs)
    textYpos(j)=P10(j)-10;
end
textYpos=textYpos';
% label the bars
for k = 1:length(facnrs)
    txt = text(textXpos(k),textYpos(k),'$\stackrel{bartext(k)}{\downarrow}$','interpreter','latex','fontsize',20);
end

The above code gives me the plot inserted below. Instead of putting the actual strings for bartext(k) it shows bartext(k) as the string in each label. The reason is because k is not recognized as a step in the last for loop.

I modified the script and tried the following:

% label the bars
for k = 1:length(facnrs)
    txt = text(textXpos(k),textYpos(k),'$\stackrel{bartext',(k),'}{\downarrow}$','interpreter','latex','fontsize',20);
end

However, then Matlab returns the following error:

"Error using text. Too many non-property/value arguments."

Does anybody have an idea how I can achieve the right labeling?

Answer 1

[Florian]

Here is how I was able to solve it in the end (if anybody wants to do a similar display):

stats=[3.0000   26.7150   43.0300   53.6300; 
    4.0000   17.5450   33.4050   80.7700; 
    5.0000   32.3300   39.6800  109.7800; 
    15.0000  179.5300  179.5300  179.5300;
   16.0000   21.5550   96.1550  156.43003]; % the row size of this matrix changes depending on previous calculations
facnrs=stats(:,1);
P10=stats(:,2);
P50=stats(:,3);
P90=stats(:,4);
neg=P50-P10;
pos=P90-P50;
% plot the results
errorbar(stats(:,1),P50,neg,pos,'o')
xsmin=min(stats(:,1))-1;
xsmax=max(stats(:,1))+1;
set(gca,'xlim',[xsmin xsmax])
set(gca,'ydir','reverse');
xlabel('Facies')
ylabel('Depth (m) from top for P10, P50 & P90')
ylh = get(gca,'ylabel');
ylp = get(ylh, 'Position');
set(ylh, 'Rotation',270, 'Position',ylp, 'VerticalAlignment','middle', 'HorizontalAlignment','center')
% label the number of occurrences for each facies on top of errorbars;
% start with counting the nr of occurrences per facies
for i=1:length(facnrs)
    x=find(facies==facnrs(i));
    noccur(i)=length(x);
end
noccur=noccur';
% compile string for number of occurrences
for k = 1:length(facnrs)
    bartext(k) = compose('$\\stackrel{n = %d}{\\downarrow}$', noccur(k));
end
for m=1:length(facnrs)
    textXpos(m)=facnrs(m)-0.5;
end
textXpos=textXpos';
for j=1:length(facnrs)
    textYpos(j)=P10(j)-10;
end
textYpos=textYpos';
% label the bars
text(textXpos,textYpos,bartext,'interpreter','latex','fontsize',20);

Plot looks like this:

[Star Strider]

I deleted my Answer because you (erroneously) accepted yours.

When I attempt to run your code (both the original and in your Answer), I get:

Unrecognized function or variable 'facies'.

Error in <filename> (line ###)
    x=find(facies==facnrs(i));

So all the necessary variables are not supplied in the code you posted.

[Florian]

Yes, you're right. Sorry for that.