How to label each line in the plot

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Med Future
Med Future on 28 Mar 2022
Answered: Scott MacKenzie on 28 Mar 2022
Hello everyone i hope you are doing well. I want to label y axis with the value i get from
Value= unique(whiteLineRows1);
but when i plot it gives the Value= as in the image attached
How can i plot the value on each line
path = 'C:\Users\DELL\Documents\MATLAB\Examples\R2021b\phased\ModClassificationOfRadarAndCommSignalsExample\NewDataset\DatasetGeneration\Detection\ImageDetection\imageclass_001001.png';
rgbImage = imread(path);
[rows, columns, numberOfColorChannels] = size(rgbImage);
if numberOfColorChannels > 1
grayImage = rgbImage(:, :, 3);
grayImage = rgbImage;
[rows, columns, numberOfColorChannels] = size(rgbImage);
mask = grayImage >= 128;
[labeledImage, numRegions] = bwlabel(mask);
props = regionprops(labeledImage, 'Area', 'Centroid');
allLengths = [props.Area];
centroids = vertcat(props.Centroid);
whiteLineRows1 = centroids(:, 2);
Value= unique(whiteLineRows1);
hold on
for k = 1 : Levels
str = sprintf('Value %d', Value(k))
yline(Value, 'LineWidth', 2, 'Color', 'r','Label',str);
hold off

Answers (1)

Scott MacKenzie
Scott MacKenzie on 28 Mar 2022
The main problem in the image is that the values are superimposed. This can be fixed by using an index into the Values array for each line:
for k = 1 : Levels
str = sprintf('Value %d', Value(k))
yline(Value(k), 'LineWidth', 2, 'Color', 'r','Label',str); % add index into Value
hold off


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