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Rearranging tables based on elements
For tables, an effective way to "transpose" (switch rows with columns, including variable names) is using the rows2vars function...

2 years ago | 0

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Finding student t critical value...
Here's demo code using tinv to produce the t-critical values for a two-sided test with independent samples (i.e., between-subjec...

2 years ago | 0

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How to draw a pulse train
It seems you want to replace the negative portion of the pulse with zeros. Like this, perhaps: fy=100; wy=2*pi*fy; duy=0.02;...

2 years ago | 0

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How to generate Pattern in MATLAB
Here's code to generate the patterns in the image posted: f = figure('color', 'w', 'Units','normalized','Position',[.25 .3 .4 ....

2 years ago | 0

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How do I make the movmean calculate the moving average at the start- and endpoints of an array but in conjunction to each other?
This seems to do the trick: A = [0 2 4 1 3 5 7]; M = movmean(A,[2 1]); M2 = movmean([A A A],[2 1]); n = numel(A); M2 = M2...

2 years ago | 0

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Answered
How to rank data and set corresponsing values
Assuming the rankings are just used to explain your final goal, the following seems to work: M1 = [0.004130861 0.001492476 -0...

2 years ago | 0

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How can I save the output figure into an image file?
A easy way is to use exportgraphics, introduced in R2020a: f = figure; imshow(...); exportgraphics(f, 'filename.jpg'); % or ....

2 years ago | 0

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Generate acoustic signal with difference rise time and fall time
Here's a simple approach that provides separate control for the rise or attack time (n1), the sustain time (n2), and the decay o...

2 years ago | 0

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Store identical rows in specified column
This seems to answer your question. There are 41 uniques IDs in the second column of your data set. The code below extracts th...

2 years ago | 0

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Answered
Save marked point on plot
OK, this seems to to work. The x-y coordinates of the marked points are output to the command window (along with the figure num...

2 years ago | 0

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Answered
Save marked point on plot
Since you haven't provided any data or code, this is a rough answer only: [pks, locn] = findpeaks(-y, 'MinPeakProminence', 0.1)...

2 years ago | 0

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How to convert an excel file (.csv) to a .wav format/any other audio format file?
I was able to play your audio data and save it as a .wav file. It's some sort of noise along with a dripping sound. But, I had...

2 years ago | 1

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Answered
how to easily and quickly change the variable names (headers) of multiple tables
For each table, it can be done like this: (To illustrate, this example is just for 5 columns) T = array2table(rand(3,5)); vn =...

2 years ago | 0

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How to assign Nans to specific column, not entire row
Your first attempt was almost correct. Here's the fix: ZB1array = rand(5,5) % test data idx = ZB1array(:,4) < 0.95; ZB1arra...

2 years ago | 0

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Answered
How to find the sum of characters in a cell array?
bowling= {{7,2,8,'/',6,2,'X',9,'/',9,0,'X','X',8,1,7,'/',9}, {'X',9, '/','X',8,'/','X','X',7,2,'X',8,'/',9,0}}; num_spares = su...

2 years ago | 2

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Answered
Plotting periodic sawtooth wave with 25%, 50% and 75% duty cycle
I'm sure there are other (perhaps better) ways to do this, but I think the following code achieves what you are after: % create...

2 years ago | 0

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why is my plot only showing 1 diagonal line
First, you probably should move the plot functions outside the while loop. Build up the vectors, then plot! But, the reason ...

2 years ago | 0

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How can I draw a line with two points x1, y1 and x2, y2 and assign weight to the edge.
x1 = 0; x2 = 1; y1 = 0; y2 = 1; line([x1 x2], [y1 y2], 'linewidth', 5); text(0.45, 0.55, '10', 'FontSize', 14);

2 years ago | 0

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how to write equation in legend correctly in latex
MATLAB by default uses a subset of TeX. That's probably all you need: % test data a=1.2345; plot(rand(1,5)); legend(['t_{...

2 years ago | 1

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Subscript indices must either be real positive integers or logicals.
You've got some funny things going on with the S_x and S_y variables. I made a small change: building up the S_x and S_y values...

2 years ago | 1

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Answered
How to draw a letter T ? the background is black and the letter itself white
Just add another white block for the top of the T: A = zeros(500, 500); A(100:200, 100:200) = 255; A(50:100, 50:250) = 255; ...

2 years ago | 1

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Answered
Decide values of row in matrix for certain row intervals
rows=150001;window=500; res=zeros(rows-window,4); flagstart = [11600 42410 72480 102100 132000]; flagend = [22620 52410 825...

2 years ago | 0

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Answered
Using fft to plot frequency spectrum of sum of rectangular pulses
I think this is what you are after. Mostly, this code just follows the example in the fft documentation, particularly w.r.t. ge...

2 years ago | 1

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Histrogram/bar chart plot problem
The code below uses your data and generates a bar chart similar to your sketch. I'm not sure how picky you are about the colors...

2 years ago | 0

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Answered
How to specify max. number of outliers on which to apply the Hampel filter?
There's probably a simpler way to do this, but I believe the code below achieves what you are after: % test data x1 = randi([5...

2 years ago | 0

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Remove unwanted noise from scatter plot using Matlab
There are many ways to approach this, for example using smoothdata or rmoutliers. Both functions have options to control how th...

2 years ago | 0

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How to Create a Surface Plot from Table Data Imported from Excel
Given some test data (attached) similar to yours... ... a surface plot can be created thus... M = readmatrix('testdata.xlsx'...

2 years ago | 1

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Answered
How to use separate locations for axis location and axis labels?
You don't need to set the x-axis location. Delete that line and then use yline to get a line at y = 0: figure time = [0 1 2 3...

2 years ago | 0

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Answered
How to draw sinewave with Scalling
Just shift the values in z up by constant... maxV=100; minV=5; f = 30; fs = 1e4; % samples per second t=...

2 years ago | 0

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Answered
shift matrix to the right
Perhaps this is what you are looking for: A=[0 0 1 1 0 0 1 1] B=[0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1] m = numel(A); n = numel(B)...

2 years ago | 2