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Simon Chan


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Active since 2021

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Answered
How to reproduce identical tab whenever button is clicked?
Set the Callback of Button pushed function as follows: % Button pushed function: Button function duplicateTab(app, event) ...

19 hours ago | 0

Answered
Measure time until type a certain key
Attached is a small program that you may try to see whether it is suitable for your purpose of not. It will open an empty figur...

2 days ago | 0

Answered
Quiver arrow doesn't show at the right place
By default, AutoScale is set to on and AutoScaleFactor is 0.9. So you may set AutoScale to off or set AutoScaleFactor to 1.

6 days ago | 0

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Answered
How to change the imagesc axis?
Use function xticklabels clear all; close all; t= 0:0.1:1; N = length(t); M = randn(N,N); figure() imagesc(M); ax=gca; x...

19 days ago | 0

Answered
Change pixels to mm in axes
Read about function <https://www.mathworks.com/help/images/ref/imref2d.html imref2d>

26 days ago | 0

Answered
Using rmoutliers without a for loop
You may consider using function <https://www.mathworks.com/help/matlab/ref/filloutliers.html filloutliers> and fillmethod to rep...

27 days ago | 0

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Answered
str2num change from 2018 to 2021
Not sure any change on function str2num, but I would use function str2double to try.

29 days ago | 0

Answered
How to apply the same style/color and axes labels to all subplots?
Another approach for your consideration. Noticed that the following example is only applicable provided all subplots have the s...

29 days ago | 1

Answered
listbox cannot make it select single or none, it has to be single or multiple.
To my understanding, multiple select does not allow select none, it has automatically select the first one unless you assign som...

1 month ago | 0

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Answered
In-Figure Toolbar overlaps with the 1st legend line
Add dummy data to make empty rows in legend for your consideration. If the dummy data mess up with your original data, then thi...

1 month ago | 0

Answered
Can I use a list box to choose several alternatives from the listed ones?
Turn listbox 'Multiselect' to 'on'

1 month ago | 0

Answered
Automated plot using values from an initial graph
Focus on the range of wavelength from 700 to 800 and find the position where abrupt change happens. %PARAMETERS n1 = 3.43; n2...

1 month ago | 1

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Answered
Geoscatter marker shape as a variable
How about this? Put them into categorical format. lat = [42.5, 42.56, 43.67, 42.29, 42.97, 43.98]; long = [11.43, 10.98, 11.7,...

1 month ago | 0

Answered
Conversion to matlab.ui.control.EditField from matlab.ui.Root is not possible.
Put it in 'Value' of the EditField object. app.outputEditField.Value=d

1 month ago | 0

Answered
How to contour plot from columns of data?
Use function scatter may be more suitable for you: filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/1...

1 month ago | 0

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Answered
Difficult resetting style sheet default for figure axis label
Try to force the OuterPosition of the axis to 0, and at the same time the size of the plotting area may be smaller. ax = gca; ...

1 month ago | 0

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Answered
Image component not updated in AppDesigner GUI
Add <https://www.mathworks.com/help/matlab/ref/drawnow.html drawnow> after the line updated the image.

1 month ago | 0

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Answered
Create a point with a number inside
r = 5; % Radius of small circle rho = 50; % Radius of big circle Np = 1...

1 month ago | 2

Answered
Adding and Deleting Columns in UITable App Designer
Attached is another apporach for your reference. The modification includes the followings: (1) Save the original table in the ...

1 month ago | 0

Answered
Plot polygons as image to process
You may use function centroid to determine the centroid of a polyshape. When you convert the polyshape into an image, the resul...

1 month ago | 1

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Answered
Getting an error while trying to animate a plot
Use capital letter D p.XData = x(1,k); p.YData = y(1,k); %..^

1 month ago | 1

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Answered
Creation of app components with a loop (AppDesigner)
Try to modify % Creation of lamps (positions) app.(str) = uilamp(app.UIFigure); app.(str).Position...

1 month ago | 0

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Answered
How do I export an animated figure to some video format for use in a presentation?
If you accept an animated GIF file as the output, check this link: https://www.mathworks.com/matlabcentral/answers/94495-how-ca...

1 month ago | 0

Answered
How to use input string as a function in Appdesign?
In case you would like to use function str2func, the string in the editfield for entering the equation should looks like the fol...

1 month ago | 1

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Answered
How to Open RT Struct
Use function dicomContours The Modality Attribute showing 'NM' and hence the attached files are NM dicom images only. So you ...

1 month ago | 0

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Answered
I want the phase portrait show arrow direction
The Auto Scale property in function quiver may make the arrow length looks small. You may adjust the AutoScaleFactor to a large...

1 month ago | 0

Answered
Why legend is not displayed?
You may refer to this answer https://www.mathworks.com/matlabcentral/answers/127195-how-do-i-add-a-legend-to-a-boxplot-in-matla...

2 months ago | 0

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Answered
How can I plot a bar char from an excel file?
Try the following: T = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1276650/Sample.csv'); X = cat...

2 months ago | 0

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Answered
Having data on yearly basis but want to have it on monthly basis
Read about function retime

2 months ago | 0

Answered
Carry out the sum of all Januarys, Februarys through December in a range of years
Read about <https://www.mathworks.com/help/matlab/ref/double.groupcounts.html groupcounts> with groupbins "monthname".

3 months ago | 1

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