Steve Eddins
Last seen: 6 days ago
MathWorks
841 total contributions since 2006MATLAB user since 1987. MathWorker since 1993. Amateur French horn player. MATLAB design and development, image processing algorithms.
Image processing blog: https://blogs.mathworks.com/steve/
Steve Eddins's Badges
Contribute at least one answer each month for 6 consecutive months
Awarded to Steve Eddins on 02 Mar 2021
20 of your answers have been accepted
Awarded to Steve Eddins on 01 Oct 2020
Provide your first answer ever to someone else's question
Awarded to Steve Eddins on 20 Jul 2017
Solve a problem with a best solution
Awarded to Steve Eddins on 22 Dec 2020
Be the first to solve a problem
Awarded to Steve Eddins on 22 Dec 2020
Solve a community group
Awarded to Steve Eddins on 19 Nov 2020
Have 3 submissions connected to GitHub
Awarded to Steve Eddins on 03 Dec 2019
Your submissions were downloaded 100 or more times in a month
Awarded to Steve Eddins on 01 Nov 2019
Publish your first comment or rating
Awarded to Steve Eddins on 09 Oct 2019
Solve all the problems in Computation Geometry I
Awarded to Steve Eddins on 16 Nov 2020
Like a problem or solution
Awarded to Steve Eddins on 13 Nov 2020
Receive 25 likes on a problem you have created
Awarded to Steve Eddins on 01 Nov 2020
Solve all the problems in Introduction to MATLAB problem group
Awarded to Steve Eddins on 26 Oct 2020
Solve all the problems in Indexing V
Awarded to Steve Eddins on 23 Oct 2020
Solve Project Euler problems using Matlab
Awarded to Steve Eddins on 15 Oct 2020
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...
8 days ago | 0
| accepted
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...
11 days ago | 0
| accepted
How to bold x axis labels
Try setting the TickLabelsInterpreter property to 'tex', like this: plot(1:10) ax = gca; ax.XAxis.TickLabelInterpreter = 'tex...
1 month ago | 0
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 ...
1 month ago | 2
Problem with datetime and daily values
Use a timetable and the retime function. >> T = readtable("data.xlsx"); >> head(T) ans = 8×5 table Date ...
1 month ago | 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...
1 month ago | 1
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...
1 month ago | 0
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...
1 month ago | 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...
1 month ago | 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...
2 months ago | 0
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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...
2 months ago | 0
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...
2 months ago | 0
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}; ...
3 months ago | 0
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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...
3 months ago | 1
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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...
3 months ago | 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 ...
3 months ago | 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
3 months ago | 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...
3 months ago | 0
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....
3 months ago | 0
Published
How imshowpair and imfuse work
In this post, I'll explore how imshowpair and imfuse work.Reason: I was curious.Last month, I wrote about registering...
3 months ago
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 ...
4 months ago | 0
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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...
4 months ago | 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...
4 months ago | 1
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...
4 months ago | 0
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...
4 months ago | 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')
4 months ago | 0
Published
Registering Hand-Held Pictures
The typical modern French* horn, pictured below, has about 23 total feet of tubing. At the beginning and the end, the tubing...
4 months ago
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...
4 months ago | 1
| accepted
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