Answered
Plotting signal of a region of interest
A possible explanation is that you have a variable called "size" or "mean" in your workspace. For example, if you have a variabl...

4 years ago | 0

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How to apply a threshold value to the cell array
I think writing a for-loop would be most straightforward way to go. Something like this: for k = 1:numel(C) C_k = C{k}; ...

4 years ago | 1

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Answered
How to change the font of a pie chart?
The text labels created by the pie function are not controlled by the font properties of the containing axes object. They are in...

5 years ago | 2

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Answered
superimpose matrices (n,n,m) to (n,n,1)
Here are some options. Compute and plot the maximum value at each pixel: imagesc(max(a100,[],3)) Compute and plot the minimum...

5 years ago | 0

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Answered
Image conversion from uint16 to uint8 mismatch
im2uint8 is using a scale factor of (255/65535), not 1/256. Note that scaling the maximum of the uint16 range, 65535, by 1/256 ...

5 years ago | 1

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Answered
How do I map array values on a logical array
Use logical indexing. C = zeros(size(B)); C(logical(B)) = A

5 years ago | 1

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Answered
Create a 7x7 convolution kernel which has an equivalent effect to three passes with a 3x3 mean filter.
Convolution is associative: So, your 7x7 convolution kernel would be the convolution of the mean filters: Use the 'full' o...

5 years ago | 0

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pgm image lossless compression
Write the image to a PNG file. The PNG format uses lossless compression. imwrite(A,'myfile.png') Read it back in using imread....

5 years ago | 0

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Shade area in graph for multiple y-axes
I rearranged your code a bit, putting both of the first two plotting functions (patch and plot) after the call to yaxis left. I ...

5 years ago | 1

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Answered
How to add percent change in barplot?
If you want text labels instead of a line plot (Cris' suggestion), then try this code. It gets the Bar object as the output argu...

5 years ago | 1

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Answered
Neighbor and center points of matrix
See my 25-Feb-2008 blog post called "Neighbor indexing" for a general technique. You'll need to pay careful attention to what h...

5 years ago | 1

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Fourier Transform of a signal
The fft function in MATLAB computes something called the discrete Fourier transform. Your problem here is asking you to find som...

5 years ago | 0

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How can I create a 3D array?
Try something like this: for i = 1:n-1 next_image = uigetfile('*p*'); ImageArray = cat(3,ImageArray,next_image); end...

5 years ago | 0

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Answered
customize export setup to generate SVG
Try this: h = findall(fig,'-property','FontName'); set(h,'FontName','San Serif'); print(fig,'-dsvg','mygraphic.svg')

5 years ago | 1

Answered
load rwb gives error
You're looking for a file called rwb.mat. Once you find it, put it in your current working folder or in a folder that's on the M...

5 years ago | 1

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Answered
How to get the x and y coordinates of the each marker in a frame?
I used the Color Thresholder app to get code that segments your image based on the green color of the markers. Then I used regio...

5 years ago | 0

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Give an unknown number of parameters to feval
Put your parameters in a cell array and then use the syntax that expands a cell array into a comma-separated list: out = feval(...

5 years ago | 0

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Answered
Infinite Recursion in own Levenberg-Marquardt Code
I see that korrektur is calling itself recursively. I noticed also that the recursive call appears to be identical to the top-le...

5 years ago | 1

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Text increments of the x-axis
Sure, you can set the XTicks property of the axes object directly. ax = gca; ax.XTicks = [1 2 3]; A shortcut for this is: xt...

5 years ago | 0

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imshow doesn't display png image file
Your image is stored in the PNG file as unsigned 16-bit integers. When imshow displays a uint16 image, it uses the unsigned 16-b...

5 years ago | 1

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Answered
How to plot particle trajectories and normalise to 0,0 origin?
Here is one way you could do it. Read in the whole Excel file as a table. Then, in a loop, extract the particle data for each tr...

5 years ago | 1

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From for to While loop
Here is one way to convert a typical MATLAB for loop to a while loop: for i = 1:N ... end i = 1; while i <= N .....

5 years ago | 0

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Select data from CSV file based on character in position, then read that character and next 2 character, of different read that character and next 3
MATLAB has a number of functions that can automatically read and parse CSV files and return the results in a useful form. Try re...

5 years ago | 0

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Vectorize "for"-loop in multidimentional array
It is conceivable that the loop might be eliminated with some sub2ind calculations followed by linear indexing, but I would expe...

5 years ago | 0

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Sort a table in ascending order
The answer would be relatively straightforward, as well as much more efficient, if you would orient your table the other way. Wi...

5 years ago | 1

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Answered
How to transform a RGB matrix to a weighted adjacency matrix?
Borys, I tackled your problem and wrote a blog post about it: "Transforming a color image to a weighted adjacency matrix"

5 years ago | 1

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Answered
Two colormaps in the same plot
The ColorBar object has an undocumented Colormap property. You can set this property directly to control the colors displayed by...

5 years ago | 0

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Answered
Two colormaps in the same plot
You can't display images with two different colormaps within the same axes. As a workaround, you could convert both images from ...

5 years ago | 0

Answered
How to get rid of deconvolution artifacts?
I think this is because you are performing inverse filtering in the frequency domain, and the blurring function has zeros (or al...

5 years ago | 0

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Answered
Function inside for loop not working
One possible explanation for the observed behavior is that the variable hcube does not actually contain a hypercube object when ...

5 years ago | 0

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