Answered
I want to draw a scatterplot but there's a problem about range of color
To specify a custom range, you can use a pre-defined RGB colormap (replace 6 with 101 or whatever is appropriate) c1 = parula(6...

2 years ago | 0

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Answered
add Gaussian distributed noise
Use normrnd

2 years ago | 0

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For loop error, not getting desired output
At the end of the inner for loop, you set all_correct(columns,1) = correct; Columns == 3 forever, and correct == 4 by that poi...

2 years ago | 0

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Answered
Swapping of data points
The hopping happens because the output of roots() isn't sorted in a way that is useful for this script. Further, when you use s...

2 years ago | 1

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pdeplot3d "value of 'colormapdata' is invalid" or "Length of colormapdata vector must equal number of nodes."
I'm not familiar with this toolbox, but... You have a 3D model, but only 2D flux. [qx,qy,qz] = evaluateHeatFlux(thermalresults...

2 years ago | 0

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Answered
How to sum two gaussian curve fits (cfit) ?
You could evaluate the fits and add them, though they would no longer be cfits. x = linspace(20,35); F1pts = feval(F1,x); F2p...

2 years ago | 1

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Answered
how to work with text files?
fopen is for low-level file operations you may not need. Perhaps try data = importdata('stud_ex.txt') Which will give you a s...

2 years ago | 0

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Answered
why is this Matlab Code faster than the C++ code below? I want to understand what Matlab internally does better and faster than C++
I see an efficiency in primes.counter = primes.counter - 1; Matlab uses LAPACK for matrix/vector operations, which I think sho...

2 years ago | 1

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Answered
Changing numbers in dataset
For only five values, I think it's pretty efficient to do a direct replacement: ds_new = zeros(size(dataset)) ds_new(dataset =...

2 years ago | 1

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Where is the error in my code?
The colon operator has a default spacing of 1. r = 0:0.07 gives: 0, % next value... 1 > 0.07 % so r = [0] Use an intermedi...

2 years ago | 0

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Issues updating vector inside a for loop
When find doesn't find any values > 0.999, it returns an empty vector, with a size of 0x1. Furthermore, max returns an empty vec...

2 years ago | 0

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Answered
Increasing Edge Lines in a Surface Plot
sf = fit([x,u],z,'poly15','normalize','on'); xpts = linspace(min(x),max(x),100); upts = linspace(min(u),max(u),100); [xx, uu]...

2 years ago | 0

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Question

Is there a good reason for choosing assert() over an if condition with an error?
I want to make sure a condition is valid, so I write a quick test for it with a boolean output. Does it matter whether I put the...

2 years ago | 1 answer | 1

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answer

Answered
How to plot a .txt file when the data is in blocks and each data is separated by space
Wow, that is an inconvenient format. One option is to use the data import tool--right-click on the text file in matlab and "imp...

2 years ago | 0

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Answered
How to append an image to a plot curve
You should be able to use a tiled layout. circuit = imread(which('RC_Charge_Circuit_Voltage.png')); figure tiledlayout(2,1)...

2 years ago | 1

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Answered
Add row numbers to side of table in MATLAB
rownums = 1:size(T,1); T.Properties.RowNames = string(rownums);

2 years ago | 1

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Matching multiple file names
You'll have to fill in some of the blanks because I don't know how you're opening files, but to find the corresponding filenames...

2 years ago | 0

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Answered
Quaternions with symbolic elements
The error says it all. It looks like symbolic variables aren't supported for quaternions. You might try a third-party toolbox: ...

2 years ago | 0

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Answered
Why am I getting an error 'Execution of script cosamp as a function is not supported'
Using the function provided by @Elghandouri Mohammed and the original script, the error I get is: Error using _*_ Incorrect d...

2 years ago | 0

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Meshgrid or other structure?
Axis_A = (-96:8:96)/2; mgrid = Axis_A+Axis_A'; would give you that matrix. As would [x,y] = meshgrid(Axis_A); mgrid = x+y;

2 years ago | 0

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How do I convert tall array duration time vector to HH:mm:ss for merging with tall array datetime vector ?
dates = tall(repmat(datetime(date),3,1)) times = tall(repmat(duration(15,12,1,345,'Format','hh:mm:ss.SSS'),3,1)) times.Format ...

2 years ago | 0

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Answered
why the plot doesn't work ,in the code i'm finding the estimation value of the phase using montecarlo simulation
since length(SNR) is 1, you are running one loop iteration and generating one point. plot() doesn't show one point unless you sp...

2 years ago | 0

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Graphical Draw Path Segments
Perhaps a "bezier toolbox" with an interactive mode would be useful: https://www.mathworks.com/matlabcentral/fileexchange/69302...

2 years ago | 0

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Answered
How to produce results of script in table
Your variables are all updated in place, overwriting the previous state. You could make an array out of each variable, and upda...

2 years ago | 0

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Answered
Imresize3 not resizing in z direction?
The second method should work. Are you sure you used imresize3() and not imresize() for that? For the first method, input all t...

2 years ago | 0

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Answered
Differential Operator in Matlab in 1 Dimension
I'm not a math major so there's probably something technically wrong about this statement, but "d/dx" is essentially "dy/dx", re...

2 years ago | 1

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Find the number of red marks in box plot
One method, which may not necessarily correlate to a boxplot in all situations (but probably works for the default boxplot), is ...

2 years ago | 0

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Answered
geting matlab installer to start on linux
From a comment deep in the thread (here), and from reading your symptoms, what typically works with this version of Ubuntu is: ...

2 years ago | 2

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Answered
Converting datenums to get time durations
I don't see where WaveHeight is declared, but you can calculate a duration by subtracting datetimes. ThreshDate = datetime('now...

2 years ago | 0

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How can I identify the amplitude peaks from an FFT?
You can use findpeaks, probably with some additional parameters. For instance, if the plotted signal is P: Z = findpeaks(P,'Min...

2 years ago | 0

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