How to display a value from a variable into a textbox

Question

Lidank Abiel 2013-4-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69798-how-to-display-a-value-from-a-variable-into-a-textbox

if true
  % code
global citra
global tampung
I = rgb2gray(citra);
BW = tampung;
      BW = im2bw(BW);
      s = regionprops(BW, I, {'Centroid','WeightedCentroid'});
numberOfBlobs = size(s, 1);
labelShiftX = -7; %untuk mengkondisikan posisi titik tengah.
      titikX = [1 2 3 4];
      titikY = [1 2 3 4];
end
hold on
      numObj = numel(s);
      for k = 1 : numObj
      plot(s(k).WeightedCentroid(1), s(k).WeightedCentroid(2), 'r*');
      titikX(k)=s(k).WeightedCentroid(1);
      plot(s(k).Centroid(1), s(k).Centroid(2), 'bo');
      titikY(k)=s(k).WeightedCentroid(2);
      end
      hold off
        Xmtkaki = (titikX(1)-titikX(4));
        Ymtkaki = (titikY(1)-titikY(4));
        Xmtkika = (titikX(4)-titikX(1));
        Ymtkika = (titikY(4)-titikY(1));
        Xmtkamu = (titikX(1)-titikX(2));
        Ymtkamu = (titikY(1)-titikY(2));
        Xmtkimu = (titikX(4)-titikX(2));
        Ymtkimu = (titikY(4)-titikY(2));
        Xmtkahi = (titikX(1)-titikX(3));
        Ymtkahi = (titikY(1)-titikY(3));
        Xmtkihi = (titikX(4)-titikX(3));
        Ymtkihi = (titikY(4)-titikY(3));

I want to display value from this variable (Xmtkaki, Ymtkaki) to a text box, but i didn't know how to display it.

need u'r help

thanks in advance.

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Answer 1

Walter Roberson 2013-4-4

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69798-how-to-display-a-value-from-a-variable-into-a-textbox#answer_80949

在 MATLAB Online 中打开

Let position1 and position2 each be (different) 4-element position vectors reflecting the location and size of the two text boxes. For example, [0 0 .1 .05]

The next two lines only need to be done once, to create the text boxes.

textbox1 = uicontrol('Style', 'text', 'Units', 'norm', 'Position', position1);
textbox2 = uicontrol('Style', 'text', 'Units', 'norm', 'Position', position2);

Then, each time you want to update the boxes,

set(textbox1, 'String', num2str(Xmtkaki));
set(textbox2, 'String', num2str(Ymtkaki));

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Lidank Abiel 2013-4-17

did u mean this sir ?

thisBlobsPixels = blobMeasurements(k).PixelIdxList;

Image Analyst 2013-4-17

No, PixelIdxList is the list of linear indexes of the pixels, whereas PixelList is their gray levels.

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Answer 2

Image Analyst 2013-4-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/69798-how-to-display-a-value-from-a-variable-into-a-textbox#answer_82062

You probably want to call impixelinfo() (in the Image Processing Toolbox). This will give live, updated x,y,gray level information to a text box on the screen (that you can position wherever you want).

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Lidank Abiel 2013-4-13

I mean sir, how to know pixel value from titikX and titikY [1] ?

Image Analyst 2013-4-13

I don't know what they represent. Perhaps you need to run my image segmentation tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862, where I find object and their centroids and label them on the image.

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