Community Profile

# Ben11

### Université Laval

149 total contributions since 2014

I'm interested in microscopy, neuroscience and image processing.
Professional Interests: microscopy, image processing

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How to generate surface of fixed width from know coordintes of curve and add pixel covered by the surface
This should do it: clear clc close all %// Define x and y to plot curve x=-10:10; y=-x.^2; %// Bu...

environ 6 ans ago | 0

MATLAB R2014A - Undo/Redo buttons
Just to complement Sean's answer, they are supposed to be at the top right corner of the window right aside the search box. H...

plus de 6 ans ago | 11

How do i convert an image plot to a matrix.
Maybe I misunderstood but you might want to use getframe and get the cdata property: Example: x = -10:10; y = x.^2; ...

plus de 6 ans ago | 0

Please format your code in the question. The error occurs because MATLAB does not recognize 3t as an expression. You need to ...

plus de 6 ans ago | 0

Problem merging two images
This will work: clc clear close all I = imread('peppers.png'); [height, width,Channels] = size(I) bl...

plus de 6 ans ago | 1

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i have an output of the following code...but i need to do haar wavelet transform of that output.PLEASE HELP ME IN CODING
You can use <http://www.mathworks.com/matlabcentral/fileexchange/40661-haar-wavelet-transform this> submission from the File Exc...

plus de 6 ans ago | 0

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How do I show relative frequency on histogram?
The relative frequency is supposed to show up on the y-axis... what about this: clear all data= 10*rand(1,1000); ...

plus de 6 ans ago | 0

mcc compiled executable didn't work!!
I think that's because, as trivial as it may sound, the disp command is used to display stuff in the Command Window, which is no...

plus de 6 ans ago | 0

imfinfo unable to open a file
It looks like you try to open a directory instead of an image. I tried your syntax and got the same error. What if you try so...

plus de 6 ans ago | 1

In the program below, the loop stops at theta(4). It will be a great help if you can please help me to rectify the error.
Initialize your array theta and change the upper limit of your for loop like so: theta = zeros(1,30); theta(1)= inpu...

plus de 6 ans ago | 1

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Not sure to understand how you would like to 'enter' the value of x, but here is a very simple example: User_x = inputdlg('...

plus de 6 ans ago | 1

how to draw a horizontal line at 63% of process curve, and vertical line to intersection of process curve, on a plot?
Add these lines after your call to plot: line([0 10],[15.75 15.75],'Color','k','LineWidth',2) % Horizontal line line([10...

plus de 6 ans ago | 0

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Passing data between axes
You can: 1) Create a dummy original image and store it in the handles structure of your GUI. handles.DummyImage = Ori...

plus de 6 ans ago | 1

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How to check in which step MATALB code is running?
You might also want to look into <http://www.mathworks.com/help/matlab/ref/dbstack.html dbstack>, which tells you the actual lin...

plus de 6 ans ago | 0

i got an error as Warning: Ignoring extra legend entries
What if you use: legend([h1(1);h2(1);h3(1)],'f1=30','f2=120','f3=400','fontsize',10); Just an idea; h1, h2 and h3 might ...

plus de 6 ans ago | 0

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Help with edit text GUI
At the beginning of this button's callback, use something like this: set(handles.edit3,'String','') which displays an em...

plus de 6 ans ago | 0

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What's the best format to export figure?
Look at the <http://www.mathworks.com/help/matlab/ref/print.html print> function, with which you can export figures in eps or pd...

plus de 6 ans ago | 0

how to change the font size in a plot (only for the axes numbers)?
Use the 'FontSize' property of the current axes: set(gca,'FontSize',20)

plus de 6 ans ago | 6

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How to extract the value pixel values from an image or masked image?
You can get the histogram of pixel values using <http://www.mathworks.com/help/images/ref/imhist.html imhist>. For example: ...

plus de 6 ans ago | 0

help with for statement
Adding an index to Pfwm and m might do the trick; with an alpha of 0.5 (arbitrary value) it did not give an error when I tried i...

plus de 6 ans ago | 0

How can I get more tick marks/precision plotyy()'s y-axis using set() or simple method?
Yes you can set the Tick marks like this: set(gca,'XTick',Begin:Increment:End); so you can customize through the Increm...

plus de 6 ans ago | 3

display value in message box
You can use sprintf to format the message: Message = sprintf('The value selected is %d\n',a); h = msgbox(Message)

plus de 6 ans ago | 0

Matrix Dimensions must agree
You're missing a "." in your division: x = [0:0.01:10]; gx = 1-(2./x.^2); plot(x,gx); axis([-1,12,-1,12])

plus de 6 ans ago | 2

how to plot two graphs combined
Maybe something like this: x=linspace(0,1,50) g=10; A=0.33 M=0.125 s=(A-0.5)*M.*g-(A^2)/4; theta=s./(2...

plus de 6 ans ago | 0

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Problem with a conversion into avi file
You just need to convert sub_movie(:,:,k) to a double before exporting. For example: for k = 1:number writeVideo(wr...

plus de 6 ans ago | 1

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Bar Graph with varying widths
For your 2nd question: In order to change the bar colors, use findobj to get the patch objects forming the bars and change th...

plus de 6 ans ago | 0

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eigenvalues and orthonormal eigenvectors
Yes there is. Look at the <http://www.mathworks.com/help/matlab/ref/eig.html eig> function.

plus de 6 ans ago | 0

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How can I display image size, dimensions and color type in the GUI?
You can get the information about an image file using <http://www.mathworks.com/help/matlab/ref/imfinfo.html imfinfo>, which out...

plus de 6 ans ago | 3

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