Community Profile # Kevin Holly

### MathWorks

Last seen: Today 2021 以来アクティブ

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Programming Languages:
MATLAB
Spoken Languages:
English
Professional Interests:

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Is it possible to use MatLab to make a interactive visualization?
Serhat, Please see the app and the Live Script attached. Let me know if that is what you were looking for. If you are look...

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I would like to plot few values of a vector based on threshold setting from another vector.
x=[1 2 3 4 5 6 7 8 9 10]; y=[1 2 3 4 5 6 7 8 9 10]; x(y>3 & y<5) y(y>3 & y<5) figure plot(x(y>3 & y<5),y(y>3 & y<5),'r') f...

ROI in video using the first frame
Read video and have user define Circle ROI: v = VideoReader('xylophone.mp4'); frame = readFrame(v); imshow(frame) c = drawci...

if column 1 is nan, make corresponding number in column2 nan
Period = [1:1:100]'; F = [201:1:300]'; A=[Period F]; % a random matrix Data = A; percent_miss = 0.1; nTime = length(Period)...

4日 前 | 0

Looking to identify a football from an image
RGB = imread('YourImage.png'); % Convert RGB image to lab space I = rgb2lab(RGB); % Apply thresholds BW = (I(:,:,1) >= 1...

4日 前 | 1

Height of circular shape
You could use regionprops to find the major axis length. Or did you need the length of the object in the y-direction? What do yo...

4日 前 | 0

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How can I calculate a formula h(t)=4.0+6.0te^-0.5t-4.0e^-0.25cos(0.75pi.t)?
You need to make sure all terms that are multiplied use *. Also replace e with 10^ assuming the e is exponent notation. t = 1:1...

5日 前 | 0

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History of opened m-files
try open(fullfile(prefdir, 'matlab.prf'))

5日 前 | 0

Customized Markers Edge and Face Colours of a scatter plot SEPARATELY
load hospital hospital x = hospital.Age; y = hospital.Weight; g = {hospital.Sex,hospital.Smoker}; h=gscatter(x,y,g,'gbmc','...

5日 前 | 0

how to remove the tiny white pixels around the rectangles
Img = imread('originalImage.png'); imshow(Img) You can also filter based on area of objects Img = bwareafilt(imbinarize(Img),...

5日 前 | 0

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3 double images stored in a matrix
m1 = rand(256); m2 = rand(256); m3 = rand(256); size(m1) size(m1(:)) M(:,1) = m1(:); M(:,2) = m2(:); M(:,3) = m3(:); ...

5日 前 | 1

How to implement tic, toc and pause in audioPlugins?
If you are trying to create a UI, you could create an app with App Designer as shown attached. Let me know if this addresses you...

5日 前 | 0

Append data to 3rd dimension in loop
Assuming you have 68 files that are distinguished based on the year and the above is only looking at 33 of the files/years. 3D ...

6日 前 | 0

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I need help to execute a triple integral
Your value for xmax needs to be a floating-point array. syms s r m; fun = @(s,m,r)(r.*exp(-(s.^2/2+1.727*(m-5))))./(sqrt(r.^2-...

6日 前 | 0

Can you try this below? [A,R] = readgeoraster('input_image.tif'); O = A*2; %any operation you like info = geotiffinfo('input_...

6日 前 | 0

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How do you remove non-integer values from a colorbar?
Let's say this is an image with a colorbar with non-integer values: Img = randi(255,25); imagesc(Img) h=colorbar; h.Ticks = ...

19日 前 | 1

How to work with the current point feature in app designer?
Please see the app attached with the script for the callback function. Let me know if this addresses your problem. Note, I also...

20日 前 | 0

How to show data in a textField on app designer?
It should be app.TextArea.Value = "testing";

21日 前 | 0

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3D shape for rabbit
That is the Stanford Bunny. Available for download here: http://graphics.stanford.edu/data/3Dscanrep/

21日 前 | 1

Trying to Customize a heatmap color bar and thresholds
m=30*rand(30)-15; surf(m,'FaceColor','interp') cmap = [1 0 0; 1 1 1;1 1 1; 1 1 1; 1 1 1; 0 0 1]; colorbar caxis([-15 15]) ...

27日 前 | 0

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How to change folders in MATLAB App Designer ?
pwd gives the present working directory. The code saves it as aux_dir. aux_dir = pwd The line below appends aux_dir with the s...

27日 前 | 0

Axes box incompletely copied to clipboard
Have you tried getframe? h = getframe(hax) Image = h.CData; You can save the Image to PowerPoint as shown below (Note, you wi...

How to match colorbar with colormap ranges in surf?
io_V1_mat=linspace(1000,100000,10); RL_mat=linspace(1000,1000000,10); VL=[2000*rand(10,4) 5000*rand(10,6)]; surf(io_V1_ma...

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Export images and PDF in App Designer
If you have the image displayed on an axes, you can do the following: h=getframe(app.UIAxes) h.cdata If you want to make a re...

Passing arguments between 2 standalone apps
Please see the links below: Create Multiwindow Apps in App Designer Share Data in Multiwindow Apps For an example, see one of...

How to get the current Axes.View after using rotate3d interaction in MATLAB appdesigner?
Please see the attached app and scripts. I created a .m file for each callback function. Let me know if you have any questions. ...

how can I plot the following graph
z = linspace(1,3500,100); n = 3000*rand(100,5); date = {'05-Mar';'12-Mar';'19-Mar';'26-Mar';'02-Apr'}; f=figure; axes("YDi...

Add data tips to figure using code
figure img = rand(800,1000); h = imagesc(img); d = datatip(h); d.DataIndex=353*800+355; d.Location = "northwest"; d2 = d...

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How to scatter plot when the values are i.e 1,1 and 1,10 grid
What do you want on your y and x axes? sparams.frequency_GHz = 10*rand(41,16); delta = rand(41,16); This one separates the ...

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How to export data and plot from app designer to excel?
Please see the app attached. You can use writetable to save your data to an Excel file. You can use xlswritefig found on the Fil...

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