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Chris


Last seen: 17日 前 2018 以来アクティブ

doin' a PhD.

Programming Languages:
Python, C, MATLAB

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質問


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...

22日 前 | 1 件の回答 | 1

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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...

約1ヶ月 前 | 0

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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)...

約1ヶ月 前 | 1

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

約1ヶ月 前 | 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...

約1ヶ月 前 | 0

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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: ...

4ヶ月 前 | 0

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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...

4ヶ月 前 | 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;

4ヶ月 前 | 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 ...

4ヶ月 前 | 0

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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...

4ヶ月 前 | 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...

5ヶ月 前 | 0

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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...

5ヶ月 前 | 0

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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...

5ヶ月 前 | 0

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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...

5ヶ月 前 | 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 ...

5ヶ月 前 | 0

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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: ...

6ヶ月 前 | 2

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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...

6ヶ月 前 | 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...

6ヶ月 前 | 0

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IF Statement Help?
This statement would flow like this, for a 30-degree angle (in pseudocode): if CurrentPosition < 45 % True, so... wri...

6ヶ月 前 | 0

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Help with a tiny project ( building a graph)
If I understand correctly, you only wish to plot I as a function of x. I have modified your function slightly (at the end of t...

6ヶ月 前 | 1

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質問


Why are alternative forms for "dbstop in file at location if expression" not documented?
This question is prompted by another question here. It was fairly easy to guess that dbstop('file','10') would set a breakpoi...

6ヶ月 前 | 1 件の回答 | 1

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Use variables in dbstop
dbstop(file,num2str(line)) Usually, functions that have input forms like dbstop has can also be called like a normal function...

6ヶ月 前 | 1

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A better way to do antidiagonal matrix vectorization?
I believe this works for tall arrays and square arrays. I haven't yet figured out how to compensate if N>M. It's not as fast as...

6ヶ月 前 | 1

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A question about the efficiency of matrix multiplication in MATLAB.
Matlab was built to do matrix math first, with the highly optimized LAPACK library at its heart. That's what it's using for case...

7ヶ月 前 | 0

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How can I average same-calendar-month returns over the prior 20-year period?
This is a complex question. I would answer your questions with a cell array of tables, and a whole lot of untested (because I d...

7ヶ月 前 | 0

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How do i write a line to display all the values that didn't meet the requirement
SigmaAp = 5; SigmaAx = randi(9,5,1) idxs = find(SigmaAx>SigmaAp) disp('Values over the limit:');disp(SigmaAx(idxs))

7ヶ月 前 | 0

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How to read GSI (text) file?
A = readlines('Example_of_GSI.txt'); parsed = split(A).strip('*'); Does that break it down enough for you to work with?

7ヶ月 前 | 0

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I need to find a pattern in a column
A = readmatrix('test.xlsx'); count = 0; for idx = 1:numel(A)-34 if sum(A(idx:idx+34)) == 0 count = count+1; ...

7ヶ月 前 | 0

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Livescript results in incorrect Math output
The commented-out line is: lambda_j + 2*rp*max(subs(g1,[x1;x2],x), -lambda_j/(2*rp)) lambda_j is 1. The second term (which use...

7ヶ月 前 | 0

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Why shift, take absolute value and perform log transform to the frequency spectrum of an image obtained by fft2?
take the absolute value The log of a negative number is undefined, which would make for a boring image. apply a log transforma...

7ヶ月 前 | 0

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