Community Profile

# Kevin Holly

### MathWorks

Last seen: Today Active since 2021

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Programming Languages:
MATLAB
Spoken Languages:
English

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How to modify with the mouse a graph generated in an axes of App Designer?
You could use listeners. See app and function attached for a simple example.

23 hours ago | 0

I have 2 columns, i want to find the maximum in the second column and then know what value it is next to on the first column
Generate data M = rand(1221,2)*1000; Find max value and it's index in rows 651 to 1221 in the 2nd column of M. [maxvalue, ind...

1 day ago | 0

Maximize button in App Designer
I would use Grid Layout.

3 days ago | 0

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Instead of trying to figure out how you calculated the areas. I used the following approach to find the masks: fig = figure; ...

14 days ago | 0

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How to stop popping up of plot figures unnecessarily in Matlab app designer?
If it is due to a plot function, you need to define the uiaxes for the plot. such as: plot(app.UIAxes,x,y)

14 days ago | 0

How to superimpose one image on another in UI Axes of Matlab app designer?
Try the following: [~,~,NR_wells] = well_finder(I_final,2); hold(app.UIAxes,'on') for c = 1:NR_wells rectangle...

14 days ago | 0

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how to use elements from array to sort data
numdata = [1500 1500 500 1500 500 2500; 850 850 200 850 200 1000; 2800 2800 1700 2800 1700 5200; 500 500 300 500 300 3000; 1...

24 days ago | 0

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trying to make a donut mask to span over images, suggestions?
RGBImage = imread("peppers.png"); imshow(RGBImage) size(RGBImage) width = 300; height = 300; [x,y] = meshgrid(1:width, 1:he...

28 days ago | 3

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Calculate the duration that variable remains in a specific value
load('tab.mat') logical_array = tab.s==3000; %chose value for speed here bar(tab.t,logical_array) t2 = table; count = 0;...

28 days ago | 0

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Plot a graph with this code.
% Problem2_28.mat % Find the phase shift between 10-Hz sinusoids found in x and y in files % sines1.mat %Check load('sines1....

28 days ago | 0

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why do i get the error using alpha too many output arguments, can anyoen help please.
alpha is a function used in plotting to change transparency. Below I change alpha to Alpha and defined it as a variable equal to...

29 days ago | 0

Creating a file from different-sized files.
Did you want something like this? Note, I attached an import function called importTTfile. load('Line_2.mat') TT = importTTfil...

29 days ago | 0

Getting stuck at Confirm User while installing MATLAB
I would recommend contacting Technical support. https://www.mathworks.com/support/contact_us.html

29 days ago | 0

Unable to perform assignment because the left and right sides have a different number of elements.
VelTren(1,9.81,46) You need to change l to l(i). function [v] = VelTren(v0,a,Lt) l=0:0.1:Lt; v=zeros(1,length(l)); v(1)=v...

29 days ago | 1

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How to change the color of the lamp?
Please see the app attached. Note, you can set limits on your edit fields. I set this one from 1 to 4.

29 days ago | 0

Build array from descriptive data without a loop
Array1 = [10,3,3;1000,178,4]; Array2 = cumsum(Array1,2)

1 month ago | 0

Visualisation of multichannel time series data
Would something like this work? time = 1:.1:50; % 500 data point signal = cos(time); for ii = 1:30 for jj = 1:40 ...

1 month ago | 1

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error using the matrices to plot a graph
The length of some of your columns didn't match up. Original table had 10 rows. Some of the new variables added to the table had...

1 month ago | 0

how to put date and time (exple 02-17-2023 06:05:34) on the x axis of a 3D plot
m = ["Jan-03-2023 06:25:12" 34 65; "Jan-04-2023 02:45:33" 56 34; "Jan-05-2023 07:05:38" 45 234] t = array2table(m) t.Propertie...

1 month ago | 1

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how run generated code from apps
You would want to save the code as a .m file. Then you can call the function with this line: createFit(close) Where close is y...

1 month ago | 0

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In following plots, how can we measure intersect points?
for y=0.1:0.1:0.3 G=[]; B=[]; for a=1:1:100 z=0.3; x=y+sind(a); G=[G x]; b=z+...

1 month ago | 1

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Can't understand you I'm getting this error when using a for loop to add two arrays
One of you variables (P_Pa, p_Pa, or q_Pa) only has one row. So, when you iterate with the for loop, you get an error when i = 2...

1 month ago | 2

Changing the number of rows in a vector by adding repeated rows
V = rand(76,3); V1 = zeros(1064,3); V1(1:76,:) = V; for ii=1:13 index = randperm(76); V1(76*ii+1:76*ii+76,:)= V...

1 month ago | 0

How to save the edited value inside the excel .xlsx file?

1 month ago | 0

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How can I extract a specific time for a "datetime" table?
load('RESULT.mat') result result.HourSeries = datetime(result.HourSeries,"Format","HH:mm") index = hour(result.HourSeries)=...

1 month ago | 1

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how to set different axis value?
xylim = 0.0055 ; N = 5; x = linspace(-xylim,xylim,N); y = x; [X,Y] = meshgrid(x,y); r = (X.^2 + Y.^2); rho = s...

1 month ago | 1

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finding slope of the graph
I would suggest using the Curve Fitting Toolbox.

2 months ago | 0

How to load the images using the code approach
1. properties folder filename end % Call back for pushbutton to load image [app.filename, app.folder] = uigetf...

2 months ago | 1

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