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...

2 years ago | 0

Answered
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...

2 years 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 ...

2 years 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...

2 years 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 ...

2 years 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...

2 years 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).'; ...

2 years 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...

2 years 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...

2 years 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 = ...

2 years 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...

2 years ago | 0

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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); ...

2 years 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(...

2 years 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...

2 years 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 — ...

2 years 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...

2 years 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...

2 years 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...

2 years 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...

2 years 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...

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

Answered
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