Answered
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...

2 years ago | 0

Answered
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...

2 years 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 — ...

2 years ago | 0

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

2 years 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...

2 years 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...

2 years 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...

2 years 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...

2 years 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 ...

2 years ago | 0

Answered
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...

2 years 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...

2 years 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...

2 years 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...

2 years 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...

2 years 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...

2 years ago | 1

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Answered
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...

2 years 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...

2 years 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...

2 years 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...

2 years 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...

2 years 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'...

2 years 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) ...

2 years ago | 1

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Answered
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...

2 years ago | 0

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How to run a code (in series) in different folders?
Probably the easiest way would be to create ‘S4’ as a function and go from there. Example — pwd A = randi(10, 5) writemat...

2 years ago | 0

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I need to innovatively produce a 140x8 matrix filled with random grades from 140 students
OPne approach is to use logiical indexing — StuGra=[60 70 80 90;50 40 30 20;20 20 20 90;10 90 10 90] Lm = StuGra < 50 ...

2 years ago | 0

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Can plot markers be specified in an array?
Both of those are possible (with the correct referencing), however I usually use a character array. Try this — marker = 'ox...

2 years ago | 1

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How to locate an entire column based on one value?
The way the median is calculated may not exactly match any of the values in the matrix. The solutiion to that problem is to u...

2 years ago | 0

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FILTER BIG DATA SET
Your qquestion is a bit ambiguous. If you want to match thee elements of the data you posted to elements of your matrix, one ...

2 years ago | 1

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Include rows containing specific value
the value you are searching for. 0.456, may not be the exact value. Use ismembertol instead of find to search for values with...

2 years ago | 1

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Answered
Need help to removing motion (breathing?) artifact from ECG signal
There does not appear to be much noise at all, however the small baseline variation and high-frequency noise can be eliminated w...

2 years ago | 0

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