Jonas Reber

Last seen: 3 years 前 | 自 2011 起处于活动状态

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

3 years 前

提问

Matlab exponent bug?
Hello MatLabers I have encountered a problem when calculating a non integer exponent/power of a variable. example: ...

12 years 前 | 3 个回答 | 1

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eigen faces
Eigenfaces are eigenvectors. When performing principal component analysis (PCA) on a set of images showing human faces, the pri...

12 years 前 | 0

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when using copyobj() with a contour, changing properties of the copy has no effect
mathworks technical support confirmed that this is a misbehaviour and that it will be resolved in a future version.

12 years 前 | 0

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Calling another program
you might be looking for system('command') [status, result] = system('command') [status,result] = system('command','-...

12 years 前 | 0

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Assigning data to variable names in a vector during a for loop.
yes this is possible. you could use the command "eval" that comes with matlab. have a look at the documentation. for your c...

12 years 前 | 1

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how to use fread function?
have a look at the documentation of fread: http://www.mathworks.ch/help/techdoc/ref/fread.html you might be looking for: ...

12 years 前 | 0

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How to save an image displayed ?
have a look at the solution I provided in your second question. it should answer both: http://www.mathworks.com/matlabcentral/a...

12 years 前 | 0

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How to recostruct ROI on an image and diaplay it?
after having read your first question ( <http://www.mathworks.com/matlabcentral/answers/18789-how-to-save-an-image-displayed>) I...

12 years 前 | 1

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Update to R2011b breaks call to addlistener
does the event exist on the "figureHandle"? get(get(classhandle(handle(figureHandle)),'Events'),'Name') what if you tr...

12 years 前 | 0

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size of image
how did you store your images? is it a 2d matrix? did you store it like: (N images of size 3 by 4) 1 1 1 1 1 1 1 1 1 1 1 1...

12 years 前 | 0

提问

when using copyobj() with a contour, changing properties of the copy has no effect
Hello MatLabers I'm using a contour plot on several axes. Since I have quite an amount of points, the calculation of the cont...

12 years 前 | 1 个回答 | 0

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提问

Multiple Callback Functions
Hello MatLabers I'm trying to have multiple callback functions executed on a uicontrol callback function. Usually I go so...

13 years 前 | 5 个回答 | 1

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Competing algorithms for SNR of a image. Which is better?
I would go for method 2 (3 is the same?) but wouln't one calculate SNR = mean2(im)/std(im(:))?

13 years 前 | 0

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2D projection in a 3D plot
something similar has just recently been asked: http://www.mathworks.com/matlabcentral/answers/8752-get-projection-image-witho...

13 years 前 | 1

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manipulate pixels in an image
if you don't have it you could take a look at e.g. http://www.mathworks.com/matlabcentral/fileexchange/4658-updownsample

13 years 前 | 0

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Data sets from image
does it help if I provide you the following code as an example...? %% Two Dimensional DFT Example % 1.Load the sample ...

13 years 前 | 1

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RGB to HSV image
does the rgb2hsv function not work? I do it that way..., hsvimg = rgb2hsv(rgbimg); ... do something ... (like saturat...

13 years 前 | 0

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Image Processing: Remove double edges
you could take another derivative (2nd) and only keep the positive values 1 0 1 => 0 -1 1 (depenting on the direction you are...

13 years 前 | 0

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subscript mismatch
maybe this one answers your question: http://www.mathworks.com/support/tech-notes/1200/1207.html#5 you try to assign/access...

13 years 前 | 0

提问

iptPointerManager significantly slows program down
Hello MatLabers As recently I was looking for a method to have a mouse over (mouse hover) effect on my graphics objects (drag...

13 years 前 | 1 个回答 | 0

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Code's improvement (plots animation)
the problem is that getframe as used by you gets the current figure as it is. If you maximize the window and "record" the movie ...

13 years 前 | 1

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get projection image without rendering to screen
you could calculate the perspective projection of your model yourself as you have all the information on camera position, look a...

13 years 前 | 2

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Trouble with ButtonDownFcn and Hittest in GUIDE
this looks reasonable to me. have you tried ThePlot = plot(xvalues, yvalues, 'Parent', handles.TheAxes, 'Tag', 'ThePlotTag'...

13 years 前 | 1

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I can not use libsvm!!!
I used libsvm myself in matlab. * download it from ( <http://www.csie.ntu.edu.tw/~cjlin/libsvm/#download>) * add the svmtrain,...

13 years 前 | 5

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Creating an inline-function in dependence of a parameter
maybe str2func is what you are looking for?

13 years 前 | 0

提问

Contextmenu Callback to set class variable
Hello MatLabers I am looking for a better/smoother way to implement the setting of a class variable in a callback. I'm sure t...

13 years 前 | 1 个回答 | 0