![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/317085/image.png)
I having trouble displaying each value next to the correct data point on stem plot.
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Michael Andersson
am 16 Jun. 2020
Kommentiert: Star Strider
am 17 Jun. 2020
I have an array of 1x20 containing the peak amplitude values and instead of displaying each text value next to the correct data point, it prints the entire array contents next to every data point.
PC = {0, NaN, -34.30, -39.90, -46.20, -47.80, -55.20, -52.20, -56.80, -60.90, -70.80, NaN, NaN, NaN, NaN, -72.80, NaN, NaN, NaN, NaN}
x=1:1:20;
subplot(3,1,3);
stem(x,RC);
text=text(x, RC, sprintf('%6.3f', RC));
set(text,'Rotation',60,'HorizontalAlignment','left','VerticalAlignment','baseline');
grid;
xlim([0, 20]);
title('Relative contribution of each harmonic ')
xlabel('Odd Harmonics');
ylabel('Contribution');
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/317064/image.png)
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Star Strider
am 16 Jun. 2020
PC = {0, NaN, -34.30, -39.90, -46.20, -47.80, -55.20, -52.20, -56.80, -60.90, -70.80, NaN, NaN, NaN, NaN, -72.80, NaN, NaN, NaN, NaN}
x = 1:numel(PC);
figure
stem(x, [PC{:}], 'filled')
grid
xlim([0 20])
lbls = compose('%.2f', [PC{:}]);
text(x, [PC{:}], lbls, 'HorizontalAlignment','center', 'VerticalAlignment','top', 'FontSize',8)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/317085/image.png)
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Image Analyst
am 16 Jun. 2020
I had made up this answer to your duplicate question, when you deleted it and I couldn't post it. So here it is:
v = rand(1, 40);
plot(v, 'b-', 'LineWidth', 2);
grid on;
[peakValues, indexesOfPeaks] = findpeaks(v);
hold on;
stem(indexesOfPeaks, peakValues, 'r.', 'LineWidth', 2, 'MarkerSize', 35);
for k = 1 : length(peakValues)
textLabel = sprintf('(%d, %.2f)', indexesOfPeaks(k), peakValues(k));
% Place text above the point by adding a little bit to the y value.
text(indexesOfPeaks(k), peakValues(k) + 0.05, textLabel, ...
'HorizontalAlignment', 'center', ...
'FontWeight', 'bold', ...
'FontSize', 12, ...
'Color', 'r');
end
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/317076/image.png)
We can't run the code you posted here because you didn't include RC, only PC. And if we change PC to RC, it still doesn't run.
Basically you need to put text() into a loop where you put up only one at a time.
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