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Simon Chan


Hospital Authority

Attivo dal 2021

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

6 giorni fa | 0

Risposto
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".

17 giorni fa | 0

Risposto
How to extract all the data between two different dates?
You may use function <https://www.mathworks.com/help/matlab/ref/datetime.isbetween.html isbetween>.

circa un mese fa | 1

| accettato

Risposto
How to create a gif?
Check the answers from <https://www.mathworks.com/matlabcentral/answers/94495-how-can-i-create-animated-gif-images-in-matlab her...

circa un mese fa | 0

| accettato

Risposto
What really is in each pixel of a DICOM slice ?
You may check the following DICOM Tags:(0028,0100), (0028,0101) and (0028,0102) regarding to the information about number of bit...

circa un mese fa | 2

| accettato

Risposto
How to convert secondly data to daily data?
Read about groupsummary.

2 mesi fa | 0

Risposto
Suppress figures instead of displaying each one and closing it.
Set the figure to invisble and use f as the handle in the following example if needed. f = figure('Visible','off')

3 mesi fa | 0

Risposto
Use Matlab Function Block to plot into figure created by Matlab Script
Try this in the function path_plotting function path_plotting(x_pos, x_pos_prev, y_pos, y_pos_prev, ax1) x_coodinates = [x...

3 mesi fa | 0

Risposto
Dimensions of array being concatenated are not consistent
Variable um1 is a column vector which have the same size as variable t or Ag. However, variable uo is a scalar which is equals t...

3 mesi fa | 0

Risposto
3D plot of output variables
Try function plot3 data = load('Output100.mat'); plot3(data.Y1,data.Y2,data.t);

3 mesi fa | 0

Risposto
Add labels to multiple points in scatterplot
Read about <https://www.mathworks.com/help/matlab/ref/matlab.graphics.datatip.datatip.html datatip>.

3 mesi fa | 0

Risposto
How to scale the data with matric of lon (1300 x 1300) and lat (1300 x 1300) ?
Use idexing as follows and please verify the variable names you are using. lon_idx = (geo.lon > 118) & (geo.lon < 124); ...

3 mesi fa | 1

| accettato

Risposto
Changing file path in a loop and save figures
Try this to indicate the entire path: savefig(fullfile(thisDir,'DN.fig'))

3 mesi fa | 1

Risposto
Exportapp error in saving entire app designer GUI
It support figure object and hence you should use: exportapp(app.UIFigure,[filepath filename]);

4 mesi fa | 0

Risposto
how to prevent plotting more curve than the axis limit in app uiaxes
Put those data below your limit to NaN. x=1:50; y=randi([-5,25],1,50); threshold = 0; y(y<threshold)=NaN; % Set thos...

4 mesi fa | 0

Risposto
In Matlab App designer eliminate the gray edge of an "Axes" component
Set the figure color to white. f = figure; f.Color=[1 1 1]; % Set color to white

4 mesi fa | 0

| accettato

Risposto
Add heatmap into uifigure (No App Manager)
You may use uipanel instead of uiaxes for heatmap

4 mesi fa | 0

Risposto
detect the largest red object, its centroid and put bounding box around it
use function <https://www.mathworks.com/help/images/ref/bwareafilt.html bwateafilt>

4 mesi fa | 0

Risposto
Meshgrid lighning and how to use contour around the plot
For the accurate solution, you need to find those x and y where z=0.2 and 0.8. If an estimated solution is accepted, the positi...

4 mesi fa | 1

Risposto
Surf plot on GUI interface
Create an uiaxes inside the uipanel or you can simply use uiaxes instead of uipanel inside the uifigure.

4 mesi fa | 0

Risposto
find and store the index value of maximum or minimum value of cell array
[~,idxMax]=cellfun(@max,yourCell); % Index for maximum [~,idxMin]=cellfun(@min,yourCell); % Index for minimum

4 mesi fa | 0

Risposto
How to create ROI object handle?
You may try the following: h = figure; imshow(imread('pout.tif')); imrect(); % not use the output of imrect() ax=gca; hAx=f...

4 mesi fa | 0

Risposto
Having issues with fprintf statement. It gives me "error using vertcat"
Missing dots in the second line, try the following fprintf(['j \t k =1 \t k=2 \t k=3 \t k=4 \n'... '- ----...

4 mesi fa | 0

| accettato

Risposto
How to align both vertically and horizontally annotation box with legend box in plots?
"annotation" dose not have properties of legend command as north, east,... I think you may need to calculate the margin separat...

4 mesi fa | 0

| accettato

Risposto
How to skip zeros values form a matrix and plot with a time values?
You may put those zero to NaN and plot it. It will skip those points. A = [1,2,3,4,0,6,7,0,9,10,11,0,13,14,15]; t=[1,2,3,4,5,6...

4 mesi fa | 1

Risposto
Plotting a legend without displaying data on UIAxes
Try this if you would like to show the figure and legend without showing the data. Set the 'LineStyle' to 'none' to hide the li...

4 mesi fa | 0

Risposto
how do i use datetime adjust xtick
Try the following without using the function datetick. f = figure; ax=gca; plot(ax,all_time_1206 , all_tide_outliner_1206,'k'...

4 mesi fa | 0

Risposto
i want to see each plot figure for every j i have, so how can i do it?
Your for loop states j = length(dt1), which is 3 in your case. So the for loop only do figure 3 for you. Use the following inst...

4 mesi fa | 0

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Risposto
How to shade the same area in each subplot in a 5x1 Figure?
If you would like to shade the entire region and already knowing the y-limits, you can put the value of those limits directly wh...

4 mesi fa | 0

Risposto
detecting circle using hough tranform
The range of radius is too small and the sensitivity may not be good enough. I choose radius from 100 to 150 pixels and sensiti...

4 mesi fa | 1

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