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detect the blue color
Use the Color Thresholder app to adjust thresholds. It's on the Apps tab of the tool ribbon. Tell it to use HSV color space, t...

2 years ago | 0

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How to detect wavelength patterns using fft2?
Your hypothesis is wrong. The "wavelengths" indicated by your arrows are not high frequencies - they are low frequencies. Anyw...

2 years ago | 0

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How to start figure window in matlab
Take the App Designer training: MATLAB App Designer If you have any more questions, then attach your data and code to read it ...

2 years ago | 0

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How to set the default documentation location to "Locally Installed" at the time of installation?
Home tab Preferences Help Click Installed locally radio button

2 years ago | 0

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Estimation of particle size in the image
Try this: % Demo by Image Analyst % Initialization steps: clc; % Clear the command window. close all; % Close all figure...

2 years ago | 0

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Squeeze some part of a plot
There are several submissions in the File Exchange for broken y axes or axes with "gaps" in them. Search for "break y axis" ht...

2 years ago | 0

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how can i blur the background?
You can try the foreground detector in the Computer Vision Toolbox. https://www.mathworks.com/help/vision/ref/vision.foreground...

2 years ago | 0

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How to speed up convolution with a million data points
Use the built-in convolutions functions: conv and conv2. They are highly optimized for speed.

2 years ago | 1

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particle size and shape analysis
See my Image Segmentation Tutorial in my File Exchange: Image Analyst's File Exchange It's a generic, general purpose demo of ...

2 years ago | 0

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Estimation of particle size in the image
Yes, it's pretty easy. Would be better if you could also post an image with just the background in there. Can we assume that t...

2 years ago | 0

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where to enter the input in fault analysis of washing machine
Take a training course on MATLAB's AppDesigner MATLAB App Designer It should show you how you can enter your input values into...

2 years ago | 0

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How to spline 163 data points into 100 data points?
See attached demo. You can easily use new values for the descriptively-named variables in the demo to do what you want.

2 years ago | 0

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big problem with matlab and simulink
Try the FAQ: https://matlab.fandom.com/wiki/FAQ#After_installation,_MATLAB_crashes_or_gives_an_error_message_when_I_try_to_run_...

2 years ago | 0

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I am new to matlab and I'm trying to filter the noise out of the audio. I tried some filters but can't event get close to lessening the noise.
Did you try the Data Cleaner app on the Apps tab of the tool ribbon? Can you upload a screenshot of your noisy original data, a...

2 years ago | 0

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The image calculation found that they are all black or all white.
img1 is an array so you need to use dot division img = (-0.18 ./ (-0.28 ./ (45.39 ./ img1 - 1)) + 1) * 5.3; And double check y...

2 years ago | 0

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Do calculations in csv data one csv file at the time
See the FAQ for code samples to process a sequence of files: Process a sequence of files

2 years ago | 0

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Errors in turbulent image analysis.
The reason for the error is that your image does not have as many as 840 rows and 1320 columns. Why are you even cropping the i...

2 years ago | 1

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How to smooth the line curves in the plot?
See attached demo. Adapt as needed. % Demo to show spline interpolation. % Clean up / initialize clc; close all; clear a...

2 years ago | 1

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calculating the velocity and distance of a rocket
Why do you need differential equations? velocity = acceleration * time and distance = (1/2) a*t^2 + v*t + d0. You only are giv...

2 years ago | 0

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How to extract the Physical value from the Raw Signal of the CAN using MATLAB coding
I have no idea what BMS is, nor CAN. Please explain and attach your data file. Zip it up if the extension is not allowed for u...

2 years ago | 0

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how to convert numerical dataset to image ?
If you're building your own network then you can just design it to use your existing matrix size of 2816 x 2500. No need to res...

2 years ago | 1

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Problem 56313. Find Air Temperature from Cricket Stridulation Rate
Not sure why you have a while loop. It will enter the while loop because F=0 is less than 50 but then you add 110 to it so the ...

2 years ago | 0

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How to segment dataset and randomly sample and append datapoints?
Try this: % Create initial full table. col1 = [3.0; 5.6; 10.2; 12.0; 14.4; 15.6]; col2 = {"08-Feb-2019 12:34:52"; "11-Feb-201...

2 years ago | 0

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Improve my MATLAB skills
See Best way(s) to master MATLAB? - MATLAB Answers - MATLAB Central

2 years ago | 0

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Modifying the search path is not supported by Matlab Compiler?
Try taking that line of code out of your program. To add files that the compilation process may not see and automatically inclu...

2 years ago | 0

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Saving 3D image after segmentation
Did you try imwrite or save? help imwrite

2 years ago | 0

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can image tiff convert to grayscale
image is a built-in function. Do not use it as the name of your variable. Zip up your image and attach the zip file with the p...

2 years ago | 0

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How would I properly go about creating this function?
What is "width_values"? You never set it equal to anything so of course it complains.

2 years ago | 0

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Not able to form the graph needed for the given equation. Error shown is in relation to the Matrix in the denominator, which I understand is wrong but can't get it right.
Try using 1./x and .*sqrt

2 years ago | 1

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Answered
Set MarkerFaceColor to be filled by default
Try this: x = 1:5; y = rand(1,5); l = plot(x,y,'o', 'MarkerSize', 30); l.MarkerFaceColor = [.6, .2, .9]; % Change color from...

2 years ago | 0