Answered
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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Answered
first time use Histogram, need help
The histogram has already been created. Use the bar function to plot it — x = reshape([0.29:0.01:0.4], 2, []); y = [30 75 ...

1 year ago | 0

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How to stop unwanted rows being added when constructing a matrix in a for loop
The reason is that there are the same number of ‘6’ and ‘-4’ being created in the loop. There needs to be one less ‘-4’. cle...

1 year ago | 0

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Answered
Slice of a 3D plot and projection of that function in a plane.
II’m not certain what result you want. Try this — x = linspace(-2,2,100); y = linspace(0,2,100); [X,Y] = meshgrid(x,y); R...

1 year ago | 2

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error using reshape , number of elements must not change
An alternative could be to use the buffer function. For example — t_OCDMSymbol = buffer(t_ModemSymbol, num_Symbol); It wil...

1 year ago | 0

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curve fitter, the coefficients are hidden as 0.0000
It may not be possible to change the display format in the app. A better option would be to use fit and, iif necessary, set t...

1 year ago | 0

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Problems with integration using functions
With this slight change: expecX_xbasis = integral(@(x)psitimesX(x),-inf, inf,'ArrayValued',true) I was able to get it to work...

1 year ago | 0

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I need help with fixing my filtering for EMG signals
You are filtering your signals twice — once wiith the movmean call and once with thte butter call. It would likely be best to f...

1 year ago | 1

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Odd behavior using datetime
If there are more than one value that you want to convert, perhaps something like this — date = [4072016 12072016]; sdate = c...

1 year ago | 0

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Error in ode45: issue with length of initial conditions vector
The ‘u’ function is either not being called correctly or not written correctly. In any event, it is miissing in the posted code...

1 year ago | 0

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How do I convert table data to double to manipulate them?
There are several ways you can convert or extract table data to an array. You can use dot notation or curly brace indexing, as...

1 year ago | 21

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How to interpolate data with different sample times
‘These structures have a field for time (in datenum format) and a field for value (lets say units of Watts)’ I would create t...

1 year ago | 0

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Intro to matlab lab and I have no idea how this works
Both questions seem to me to involve element-wise operations. See the documentation section on Array vs. Matrix Operations for...

1 year ago | 0

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How to get the values of the XAxis Minor Ticks (of an inset plot)
Assign the output to a variable — % create a plot x1 = linspace(0,1000); y1 = sin(2*pi*x1); plot(x1,y1) set(gca,'Fontsize'...

1 year ago | 1

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How can I draw a frame around the inset plot?
Use an annotation object — x1 = linspace(0,1); x2 = linspace(3/4,1); y1 = sin(2*pi*x1); y2 = sin(2*pi*x2); figure(1) ...

1 year ago | 1

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Can gamultiobj skip over instances where the function cannot solve?
II am not certain about gamultiobj because I have very limited experience with it. However ti has been my experience when using...

1 year ago | 0