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3D vector plot having starting and ending points
It would help to have your code. The way I usually plot vectors in 3-space — x = [1 2]; y = [3 4]; z = [2 8]; figure ...

1 year ago | 0

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Find average average value of data
To get the mean of each row, calculate the mean across dimension 2 (column size) — x=[ -81.12 -78.91 -73.64 -79.26 -155.66 ...

1 year ago | 0

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Answered
Standard deviation for RMS comparison of two windows
Root-mean-square (RMS) calculations are best suited to estimate the D-C amplitude of a signal over long periods or the entire si...

1 year ago | 0

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How can I calculate three different shaded areas?
Try this — T1 = readtable('example.xlsx') for k = 1:2:size(T1,2) xv = T1{:,k}; yv = T1{:,k+1}; idxrng = (xv ...

1 year ago | 0

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Answered
How to use Matlab to find a pressure in a temperature and density spreadsheet using the nearest density value.
It would help to have your data. Use the scatteredInterpolant function to find (and if desired, plot) any value you want with...

1 year ago | 0

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fplot with two y-axis
This seems to work — Sp = @(t) (5+sin(2*pi*log(t)))/750; St = @(t) (1+cos(1.5*pi*log(t)))/500; figure (10) yyaxis left f...

1 year ago | 1

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Answered
Having trouble printing variables I use as inputs to a function.
The problem is that the ‘mass’ value provided to ‘MyFun2’ is zero, since the value being passed to it is ‘m’ and not ‘mass’ and ...

1 year ago | 0

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Answered
synthetic data follow specific distribution
Choose the appropriate distribution and select the related function that produces random numbers. Examples are normrnd, poiss...

1 year ago | 0

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Regarding precision and numerical instability in MATLAB
The problem of 16 parameters with 10 equations is not going to result in unique values for the 16 parameters, regardless of the ...

1 year ago | 0

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Why does the value of tolerance stop at n=2 (third value of the iteration) within the while loop?
The loop appears to be working correctly. Adding ‘Check_Convergence’ and examiining the results demonstrates this — clear;c...

1 year ago | 1

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Answered
How do I manually set color of individual datapoints of figure ?
Stiill lacking your data, I am guessing at the problem and proposing a solution. Try this — x = (0:14).'; ...

1 year ago | 0

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Turn tables in a loop into a single cell array
Perhaps something like this — for k = 1:numel(OPALData) F = fullfile(OPALData(k).folder,OPALData(k).name); % I...

1 year ago | 0

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Answered
fprintf not printing to command window when asking for input.
When I run your input line, it prints this to my Command Window: Enter the number of the song you wish to play --> and then...

1 year ago | 0

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How do I manually set color of individual datapoints of figure ?
One option is to specify a colormap and then index into it — cm = turbo(5); Fs = 1000; t = linspace(0, 301, 302).'/Fs; E = ...

1 year ago | 0

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Finding peaks in a very noisy signal
Your signals have broadband noiise, so a frequency-selective filter is not going to apply here. The Savitzky-Golay filter (or w...

1 year ago | 0

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Loop for reading and extracting data from a single line of multiple text files.
I generally do something like this — files = dir('*.txt'); for k = 1:numel(files) txt = fileread(files(k).name); ...

1 year ago | 0

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Answered
Monthly to annual totals
This is straightforward with the accumarray function — Y = 1960:1999; M = 1:12; Data = [[repmat(M(:), numel(Y), 1) repelem(Y(...

1 year ago | 0

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Trouble Plotting Basic Function
It appears to be coded correctly. How is it supposed to appear? X = -4:0.01:10; Y = X.^3 - (sin(X)) - (exp(X)); figure...

1 year ago | 0

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How to search and find array in array?
The ismember function is doing exactly what it should. You need to examine ‘bigArray’ tto understand its output. Try this — ...

1 year ago | 0

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Answered
Update the number of columns needed for my times table
It would heelp to have your .csv file and a description of what you want to do. Also, it might be easiier to do this in a table...

1 year ago | 0

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Answered
Segregating an EMG signal based on activation
It would help to ahve the data. Lacking it, I’ll create some. I generally approach ensemble problems such as yours like this...

1 year ago | 0

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Phase Plots Dropping when quadrant changes
Use either the angle function or atan2d for this. The angle function returns the angle of a complex variable in radians, so you...

1 year ago | 0

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How to remove border from MATLAB figure
It might be easier to do that when you first create the spectrogram. Try something like this — Fs = 1000; L = 10; t = li...

1 year ago | 0

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How to plot a 3D contour plot when the contours is a forth vector
Use the contour3 function. If ‘A’ is a list of the contour levels, all the MATLAB contour functions accommodate defining the c...

1 year ago | 0

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Customizing plots that are matrices of column vectors?
It is reelatively straightforward to change the markers (and other propeerties) after plotting. Try something like this — ...

1 year ago | 0

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Plot 3D Meshgrid
See thee documentation sections in Volume Visualization.

1 year ago | 0

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Best fit line for scatter data along y=x line
What sort of regression would you want for the volume in the second figure? LD1= load('uu.mat'); uu = LD1.uu; uu_size = siz...

1 year ago | 0

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Answered
Filtering white noise signal from acceleration data
The best way to deal with broadband noise is either to use wavelet denoiising or the Savitzky-Golay filter (the sgolayfilt funct...

1 year ago | 0

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Answered
How to Remove Noise from Plot of Velocity Profile?
It is difficult to determine from the image what the ‘noise’ actually is. If it is significantly higher or lower in frequency c...

1 year ago | 0

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QRS area calculation from ECG
II have heard of the Kors transformation matrix, however I have never used it. I just now did an Interweb search, and I was not...

1 year ago | 0

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