Chaowei Chen

University of Maryland

Aktiv seit 2011

Followers: 1 Following: 0

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Professional Interests: Human machine interface, integration of software and hardware, image processing, microscopy, convex optimization

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Creating a movie sequence from rgb images
for frame_idx = start_frame:end_frame image = dataset(:,:,frame_idx); msk = mask_stack(:,:,frame_idx); ...

etwa 8 Jahre vor | 0

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The command line is too long. Error: An error occurred while shelling out to javac (error code = 1). Unable to build executable.
I am using mcc to build java classes from .m files The command is following: mcc -W "java:matlabapi,DefaultClass" -T lin...

fast 10 Jahre vor | 0 Antworten | 0

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fast 10 Jahre vor | 1 Antwort | 0

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fast 10 Jahre vor | 0 Antworten | 0

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change shorkeys "ctrl+shift+0" for editor
I understand that ctrl+shift+0 focuses window to the editor. I wonder if it is possible to change "ctrl+shift+0" to "ctrl+~" fo...

fast 13 Jahre vor | 1 Antwort | 0

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how to set position and outerposition respectively the same as from another axes?
I want to display a scalebar on a 3d plot. When I rotate the 3d plot, I want to keep the scalebar still. The way I approach it i...

mehr als 13 Jahre vor | 1 Antwort | 0

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how to draw a hyperboloid?
[x,y]=meshgrid(-10:10); r_sq=x.^2+y.^2; z=sqrt(r_sq+1); surf(x,y,z)

etwa 14 Jahre vor | 0

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make result matrix for comparing of (for example) 20 inputs matrix with 20 refrences matrix
You can use cell matrix, which contains mixed type of values. In your case, the first column and row are string while the rest ...

etwa 14 Jahre vor | 1

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How to catch reaction time with MATLAB; How to save text file from command window automatically
1. doc diary 2. I think the problem happens at kp=find(kp) It means wherever kp is nonzero, assign the position to kp. My m...

etwa 14 Jahre vor | 0

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Inline Indexing to Dynamic Field Names
Varnames={'var1', 'var2', 'varx', 'vary'}; %if varx is scalar TestStruct.(Varnames{1,3}) = 0 %if varx is array TestS...

etwa 14 Jahre vor | 1

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To get dominant eigen vector
[U,S,V]=svd(C) gives you the singular value decomposition of C. i.e., C=U*S*V' where the singular values S are in decreasing or...

etwa 14 Jahre vor | 1

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how to draw tangent line simulink graph ?
function plot_tangent(x,y) if nargin<2, x=1:0.01:10;y=sin(x); end s=diff(y)./diff(x); f_tangent=@(a...

etwa 14 Jahre vor | 0

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Play Video in MATLAB GUI with other Objects
function main [f,p]=uigetfile('*.avi');cd(p) h_play=uicontrol('style','pushbutton','callback',@play_vid,'string','pl...

etwa 14 Jahre vor | 0

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Play Video in MATLAB GUI with other Objects
function main vid = videoinput('winvideo', 1); figure; h_play=uicontrol('style','pushbutton','callback',@play_vid,'stri...

etwa 14 Jahre vor | 0

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Play Video in MATLAB GUI with other Objects
function main(var_3D) if nargin<1, var_3D=randn(100,100,100);end [R,C,Frame]=size(var_3D); h_play=uicontrol('st...

etwa 14 Jahre vor | 0

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Beantwortet
How to use spatial image coordinates to get image pixel values??
You are almost there. ROI=roipoly(img); pixValue=img(ROI);

etwa 14 Jahre vor | 0

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How to scan a user-input sentence/phrase for the individual words
Just a subtle improvement to Jiang's approach. (To get rid of the period symbol) InputText='This is is my testing speech.'; ...

etwa 14 Jahre vor | 0

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How can i extend my graph to a certain point in the graph
I think you probably just want to do axis([0 16 0 500])

etwa 14 Jahre vor | 1

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autocorrelate rows of matrix without using a for loop
The idea is to convert mat to cell since each row is independent. After processing, convert cell back to mat. a2=mat2cell(a,...

etwa 14 Jahre vor | 0

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I need to import a file of unsupported format into Matlab (multiple image sequence)
Does the file follows a certain format like tif? In this case, frame_k = imread('filename.tif',k); If it is a custom format,...

etwa 14 Jahre vor | 0

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Delete/Hide points of a surface
figure;hold on; h1=plot(1,1,'b.'); h2=plot(2,2,'r.'); hold off % if you want to hide h2 set(h2,'visible','off') % if...

etwa 14 Jahre vor | 0

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put time stamp on video using videowrite
clc;clear;close all vid = videoinput('winvideo', 1); set(vid,'TriggerRepeat',Inf); vid.FrameGrabInterval = 1; vid_sr...

etwa 14 Jahre vor | 1

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Generalized eigenvalue problem
If V'*B*V = I, This indicates B is identity matrix, therefore, simply [V,D] = eig(A)

etwa 14 Jahre vor | 0

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Change file extension from .wav to .res
Supposing you just want to rename the file, do this ! ren temp.wav temp.res

etwa 14 Jahre vor | 0

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Fourier Series Coefficients
fft does not require a specific number of samples to work. Equivalently, it works because fft pads zeros to your sample. If y...

etwa 14 Jahre vor | 0

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input prompt
for i=1:30 g=input(['enter ' int2str(i) ' th line']); end

etwa 14 Jahre vor | 1

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