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Chaowei Chen


University of Maryland

Active since 2011

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

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

meer dan 7 jaar ago | 0

| accepted

Question


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...

ongeveer 9 jaar ago | 0 answers | 0

0

answers

Question


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 link:li...

ongeveer 9 jaar ago | 1 answer | 0

1

answer

Question


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 link:li...

ongeveer 9 jaar ago | 0 answers | 0

0

answers

Question


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...

ongeveer 12 jaar ago | 1 answer | 0

1

answer

Question


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...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Answered
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)

ongeveer 13 jaar ago | 0

Answered
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 ...

ongeveer 13 jaar ago | 1

| accepted

Answered
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...

ongeveer 13 jaar ago | 0

Answered
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...

ongeveer 13 jaar ago | 1

Answered
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...

ongeveer 13 jaar ago | 1

| accepted

Answered
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...

ongeveer 13 jaar ago | 0

Answered
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...

ongeveer 13 jaar ago | 0

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

ongeveer 13 jaar ago | 0

Answered
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...

ongeveer 13 jaar ago | 0

| accepted

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

ongeveer 13 jaar ago | 0

Answered
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.'; ...

ongeveer 13 jaar ago | 0

Answered
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])

ongeveer 13 jaar ago | 1

Answered
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,...

ongeveer 13 jaar ago | 0

Answered
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,...

meer dan 13 jaar ago | 0

Answered
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...

meer dan 13 jaar ago | 0

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

meer dan 13 jaar ago | 1

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

meer dan 13 jaar ago | 0

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

meer dan 13 jaar ago | 0

Answered
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...

meer dan 13 jaar ago | 0

| accepted

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

meer dan 13 jaar ago | 1

| accepted