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Simon Chan


Hospital Authority

2021년부터 활동

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

21일 전 | 0

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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')

25일 전 | 0

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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...

29일 전 | 0

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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...

29일 전 | 0

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

29일 전 | 0

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

약 1달 전 | 0

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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); ...

약 1달 전 | 1

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

약 2달 전 | 1

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

약 2달 전 | 0

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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...

약 2달 전 | 0

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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

약 2달 전 | 0

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

2달 전 | 0

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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>

2달 전 | 0

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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...

2달 전 | 1

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

2달 전 | 0

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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

2달 전 | 0

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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...

2달 전 | 0

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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'... '- ----...

2달 전 | 0

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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...

2달 전 | 0

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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...

2달 전 | 1

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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...

2달 전 | 0

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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'...

2달 전 | 0

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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...

3달 전 | 0

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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...

3달 전 | 0

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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...

3달 전 | 1

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Error using convert2quaterly: The value of 'TT1' is invalid.
Your data has only one column besides the date. So you can only state one method to your data. The following shows an example w...

3달 전 | 0

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JPG to GIF animation
The colormap for the first two figures are overwritten by the third one in the following: [A,map] = rgb2ind(imread('obr_0.jpg')...

3달 전 | 0

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delete consecutive commas in txt file
May be this: rawdata = readlines('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1122645/ca.txt'); iwant = [];...

3달 전 | 1

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Save a Figure as a .png and .pdf of a Specific Size
Try this to see whether the following is what you want. clear; clc; f = figure; plot(1:10,1:10); % Set figure position after...

3달 전 | 0

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Import data csv with date/time and other info with setvaropts
Try this: opts = detectImportOptions('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1121365/essai_data_3.csv',...

3달 전 | 1

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