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Issue in plotting binary image boundaries with real axis values
The function bwboundaries returns boundary values in pixel coordinates. You'll need to scale those to world coordinates yourself...

5年弱前 | 0

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How to change boundary width in Active Contour Method?
Call visboundaries with an output argument. That output argument will be an hggroup object containing two lines. You can then ma...

5年弱前 | 0

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Having graycomatrix rescaling problem
Here is the doc for the NumLevels parameter: Number of gray levels, specified as an integer. For example, if NumLevels is 8, gr...

約5年前 | 0

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How to find the center position under the saturation spot signal
Try converting the image to binary using imbinarize and then using regionprops to compute the centroid. rgb = imread('image.bmp...

約5年前 | 0

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How to bold x axis labels
Try setting the TickLabelsInterpreter property to 'tex', like this: plot(1:10) ax = gca; ax.XAxis.TickLabelInterpreter = 'tex...

約5年前 | 0

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three difference vectors and plots
I have copy-pasted your code below, exactly as entered in your question. It runs and produces the plot with no error. I suggest ...

約5年前 | 2

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Problem with datetime and daily values
Use a timetable and the retime function. >> T = readtable("data.xlsx"); >> head(T) ans = 8×5 table Date ...

約5年前 | 0

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What is the best way to count the occurrences of two table columns together?
In my previous answer, I forgot that grpstats is in the Statistics and Machine Learning Toolbox. Here is an answer using groupsu...

約5年前 | 1

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What is the best way to count the occurrences of two table columns together?
I think grpstats will do what you want: >> grpstats(T,["A" "B"]) ans = 4×3 table A B Grou...

約5年前 | 0

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Find peaks not working on my data set
I suspect the issue is with the x-coordinates that you are using to plot the peaks. You are plotting the peaks against the indic...

約5年前 | 1

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Assign values in a matrix
One idea is to use a timetable and the retime function. Suppose I have the following matrix for a 4-minute charge and a 3-minute...

約5年前 | 0

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Code is showing Undefined function 'pixelHull' for input arguments of type 'double'.
I wrote a function called pixelHull as part of my 16-Mar-2018 blog post. You can find the function listing near the bottom of th...

約5年前 | 1

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Binarize image for specific colour
Use the Color Thresholder app to generate the code needed to do this segmentation. See my 14-Oct-2019 and 25-Apr-2014 blog posts...

5年以上前 | 0

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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...

5年以上前 | 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}; ...

5年以上前 | 1

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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年以上前 | 2

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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年以上前 | 0

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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年以上前 | 1

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

5年以上前 | 1

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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年以上前 | 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年以上前 | 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年以上前 | 1

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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年以上前 | 1

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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年以上前 | 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年以上前 | 0

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Matrix Pattern 1

5年以上前

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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年以上前 | 0

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

5年以上前 | 1

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Double the next and alternate sign

5年以上前

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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年以上前 | 1

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